la. Last legs 6-jointed

Key to the Genera of Oryinae.

2.

2a. Paratergites wanting completely. Some of anterior sternites densely pubescent and with two impressions . Diphtherogaster Att.

26. 1-3 rows of paratergites. Sternites without the peculiarities mentioned above 3. 3a. Claw of second maxillae hollowed out, not pectinate. No frontal sulcus. Tergites with two longitudinal sulci

Notiphilides Latzel. 36. Claw of second maxillae pectinate. Frontal sulcus present. Tergites with four sulci

16. Last legs 7-jointed

Pentorya Ck. 4.

4a. Scutellum and praescutellum fused. (Claw of second maxillae simple. One row of paratergites)

Orya, Mein.

46. Scutellum and praescutellum separate, at least in the middle and posterior segments

5a. Claw of second maxillae simple. 161 pairs of legs

.

5.

Heniorya Ck.

56. Claw of second maxillae pectinate or with lateral bristles in the basal half. Number of pairs of legs at the most 111 6. 6a. One row of paratergites. Mandible with 4-5 pectinate lamellae. Female genital appendages 2-jointed .

Orphnaeus Mein.

6b. 2-3 rows of paratergites. Mandible with 7-8 pectinate lamellae. Female genital appendages 1-jointed.

7.

7a. Middle and posterior segments with two rows of paratergites. No frontal sulcus

Aspidopleres Porat.

7b. Posterior segments with three rows of paratergites; frontal sulcus present

Gen. DIPHTHEROGASTER Att.

Ctenorya Ck

1909. Attems, Schultze's Forschungsreise S. W. Afrika, p. 16.

58. Diphtherogaster flavus Att.

1909. Attems, loc. cit., p. 16.

N.W. Div. of Cape Province (7580), Clanwilliam (7583), Cape. Steinkopf, Little Namaqualand (Schultze); Windhoek, Okahandja (Michaelsen), S. W. Africa.

Gen. ORYA Mein.

1870. Meinert, Naturh. Tidsskr., (3), vii, p. 14.

1903. Attems, Synopsis d. Geoph., Zool. Jahrb., xviii, p. 199. 1902. Saussure and Zehntner, Grandidier, Madagascar, p. 339.

Orya barbarica Gerv.

1835. Geophilus barbaricus Gervais, Mag. Zool. d. Guerin, ix,

pl. cxxxiii, fig. 3.

1870. Orya barbarica Meinert, Naturh. Tidsskr., (3), vii, p. 16.

1803. Himantarium fusatum Koch, Die Myr., ii, pp. 90, 195, fig. 212; p. 106, fig. 213.

(Pl. XIX, figs. 465, 466; text-figs. 23-29.)

Colour brownish-yellow. Very large; up to 22 cm. (Meinert says 115-120 mm.). 97-125 pairs of legs. Head-plate with fine punctations, nearly as broad as long; frontal sulcus distinct. The first three antennal joints with scattered hairs, nearly hairless; the pubescence increases quickly and the seventh or eighth joint is densely pubescent. All hairs short. No long bristles. Antennae short, extending to the posterior margin of the first foot-bearing

TEXT-FIG. 23.-Orya barbarica Gerv. Labrum.

segment; awl-shaped. Clypeus regularly tessellate and pubescent. The hairs minute; the central part raised and fused with the labrum, the suture between labrum and clypeus disappearing in the middle and preserved at the sides. The labrum consists of one piece, but near the middle two fine parallel lines are visible. Meinert calls the labrum "bipartite"; but that is incorrect, as are also his drawings. The free border bears little close-set teeth in the centre, and longer, sharp, curved teeth at the sides (text-fig. 23). The shaft and the trunk of the mandible are distinctly separate. Meinert mentioned 7-8 pectinate lamellae; I observed only five (Tunis). The lamellae are arranged on the sides. The teeth are short (text-fig. 24). The coxal processes of the syncoxites of the first maxillae (fig. 466) are bounded by a fold, and bear few bristles. The syncoxite has on each side a pointed lobe covered with scales like those on a pineapple. Telopodite indistinctly 2-jointed, the basal joint with a broad,

rounded lobe turned to the dorsal side, the distal joint densely pubescent. The second maxillae (fig. 465) consist of the syncoxite and the 3-jointed telopodites, which are covered with short bristles. Terminal claw simple, spoon-shaped.

Main tergites from the third with two longitudinal sulci and a shallow groove on the side of the sulci, slightly wrinkled, the last

TEXT-FIG. 24.-Orya barbarica Gerv. Mandibles.

tergites becoming more finely granular towards the posterior end. The main tergites meet laterally and are sand-glass shaped in a transverse direction; the little intercalar tergites are therefore pointed at the sides; on the first segments they are nearly invisible. The sternites are twice as broad as long, smooth, with two shallow transverse impressions. The little pores are arranged in a close square, intermixed with minute hairs confined to a bare non-reticulated spot. On the posterior border of the sternite each hair is inserted in a little groove.

Praescutellum (Psc) and scutellum (Sc) are fused (text-fig. 25). One row of two paratergites (Ipl). The coxa is surrounded by several sclerites, two ventral (procoxa and metacoxa, Verh.) and three dorsal (katopleurae, Verh.). These sclerites are not all sharply separated, but are parts of the folded and flexible pleural membrane,

forming smaller and inconstant sclerites between the main sclerites mentioned above. The intercalar sternites are narrow and medially pointed. When the animal is contracted they are invisible on the anterior and middle segments. The ventral pleurites have the same pores as the sternites, but in smaller numbers. They bear besides dispersed minute hairs, like the tergites (main and intercalar tergites). The tergite of the last foot-bearing segment is large, kidney-shaped, connected with the genital tergite by an intersegmental membrane. This membrane passes directly into the pleurae of the genital segment, and these pleurae pass dorsally without suture into the coxae of the

last legs, a true coxopleura being developed. The intersegmental membrane is hairless in contradistinction to the tergites. The sternite of the last foot-bearing segment is rounded behind in the ♂, and at the sides and behind the coxa a large part of the intersegmental membrane is exposed. In the the sternite is very short and broad, and rectilinear or sinuate behind. The intercalar sternites of the last foot-bearing segment meet under the margin of the preceding sternite. The last legs are 7-jointed; the coxa is non-porose, with no terminal

T

TEXT-FIG. 26.—Orya barbarica Gerv. Posterior end of 3, dorsal view.

claw. The legs of the ♂

are but slightly incrassate and covered with dispersed hairs.

The genital region has one large tergite, densely pubescent, rounded behind (text-fig. 26). The sternite of the praegenital segment is short and broad, pubescent in both sexes. The sternite of the genital segment of the (text-fig. 27) is almost separated from the sternite of the praegenital segment by the large pubescent pleurae nearly meeting in the middle.

line. The genital sternite is triangular, the angles blunt. The posterior border is declivous, and bears the 2-jointed genital appendages between the gonopods; the sac of the penis is visible as a blunt pubescent cone with a dorsal longitudinal slit beset with strong bristles. The penis (text-fig. 28, Pen) rises out of this slit, and bears two little pubescent cones, one on each side of the genital aperture.

In the the sternite of the genital segment is very large and reaches to the sides of the body, on account of which the pleurae are not visible. The posterior margin is rectilinear and bears the 2-jointed genital appendages meeting in the middle line. The second joint is very small (text-fig. 29). The anal segment is rudimentary, especially in the 3, and soft and membranous in all its parts. We cannot discern a tergite. The ventral side in the ? is somewhat more strongly chitinised.