8 Proceedings of the Royal Irish Academy. 



corner of the sub-coxae to which they belong. Each gonapophysis is worked 

 by appropriate muscles — an adductor (fig. 65 ad) the insertion of which is 

 carried but a short distance along the appendage ; and an extensor fig. 65 crt), 

 some of whose fibres are inserted close to the base, while a few, drawn out to a 

 great length, extend right along the outer margin of the gonapophysis, almost 

 to its tip (fig. 65 e;d']. The segmentation of these appendages is well marked ; 

 the proximal segments (fig. 65 a) bear few, feeble, and short bristles ; but 

 beyond the extremity of the ninth abdominal sub-coxae these bristles become, 

 almost suddenly, long, stiff", and prominent (fig. 65 B), this character persisting 

 almost to the extreme tip I'fig. 65 c). Each sub-coxa of the ninth segment 

 articulates with a small, sub-triangular, basal sclerite which from its position 

 might be regarded as an episternum (fig. 64e/js<). From it originates an 

 abductor muscle (fig. 64 abd), whose fibres pass, diverging slightly towards the 

 axis of the body, and are inserted into the inner edge of the base of the 

 sub-coxa. 



The scaling of C. hreripalpis — as of the other species of Corethromachilis 

 — resembles that found generally in the family. Two typical forms of scale 

 from abdominal sub-coxae are figured (fig. 66), one being of a moderately 

 broad, and the other of a narrower and elongate, type. Some of the smaller 

 and more delicate scales are broader than long. 



CorethromacMlis gibba sp. nov. 

 (Plate IV, figs. 45-62.) 



Paired ocelli (tig. 4fi, 47 p.o.), short and ovoid, situated on either side of a 

 conic<al prominence in front of the eyes. Jaws transversely extended, and 

 brush of maxillary lacinia complex, as in C. Gurdineri. Maxillary palp 

 nearly half as long as body. Thorax with the mentanotum produced dorsal- 

 wards into a prominent hump; margin of mesonotum broadly convex 

 laterally, and sinuate in front (fig. 45). Legs short; foot-claws short and 

 scopulae dense (fig. 55). Feelers and tail-process half as long again as body. 

 Cerci two-thiids length of body. 



Length 10mm. Colour of scaling, dark. 



Localities. — Mahe : Mare aux Cochons, 1500 feet, in dead leaves (January, 

 1909, one female). Silhouette : 1500 feet, in high damp forest, among fallen, 

 rotteir palm-leaf bases, and other dead leaves in damp and shady jungle 

 (eight specimens of both sexes, August, 1908, collected by Mr. H. Scott, who 

 states that they jump vigorously). 



This insect, with the great hump on its metathorax and the outstanding 

 conical process in front of the head, may be distinguished at a glance from all 



