318 Mr. Shuckard's Monograph of the Dorylidae, 



the base, whence they suddenly narrow to the apex, the anterior la- 

 teral return rather broad ; the labruni having two obtuse tubercles. 



Thorax gibbous in front and at the scutcllum, which is transverse and 

 rounded; the mesothorax in front having a short depression on each 

 side of the two central abbreviated impressed longitudinal lines par- 

 allel with the suture, metathorax produced longitudinally, horizontal, 

 where it is abruptly truncated and fringed ; wings darkly clouded, 

 willi their nervures black and rather thick, the marginal nervure ex- 

 tending to nearly opposite the inner angle of the marginal cell, the 

 cubital nervure slightly sinuated to the insertion of the recurrent (which 

 is inserted at about half the length of the first submarginal), beyond 

 which to the termination of this cell it is straight: legs dark chestnut; 

 femora elongate triangular, their whole outline beneath curving out- 

 wards. 



Abdomen cylindrical, the peduncle transverse quadrate, convex, not so 

 broad as the base of the following, slightly fringed along its apex, 

 where it has an indicated ridge; the ventral portion with its boat- 

 shaped carina very sharp, second segment also transverse, rather 

 longer and broader than the peduncle; the terminal segment slightly 

 reflected at its extreme apex, where it is densely pilose. 



In my own and the British Museum collections. 



This species is from the Gambia. Next to the D. nigricans it is the 

 most robust of the genus. It is sufficiently distinct from all, but it 

 has the tuberculated labrum in common with the two following. 



Sp. 5. Dor. Juvenculus, Shuck. Length 15^ lines. 



Expansion 24 lines. 



Rufo-fuscus, glaber, subattenuatus ; capite {antennis mandibidisque castaneis 

 exceptis) et nervis alarum nigris, vertice valde prominente, facie in medio 

 sulcata, labro tuberculis binis instructis et pedunculo abdominis quadrato- 

 convexo. 

 Rufo-fuscous, smooth, with long curling hair only on the face, between the 

 coxae and peduncle and at the apex of the abdomen ; the head black, 

 except the antennae and mandibles which are castaneous ; face and 

 forehead very prominent, this prominence viewed laterally (in pro- 

 file) as large as the eye; ocelli placed in an equilateral triangle on 

 the vertex, the posterior pair on the posterior declivity of the head 

 closely behind the summit, and these distant more than the diameter 

 of oae from the anterior, in front of which the face is deeply sulcated : 

 eyes very prominent and subglobose; antennae setaceous, the scape a 

 little less than one-third the length of the organ ; mandibles long and 

 slender, slightly curved, rather broad at the base, whence they imme- 

 diately attenuate, their return in front broadest in the middle, nar- 

 rowed at each extremity ; clypeus furnished between the base of the 

 antennae with a long flock of curling hair, and the labrum with two 

 small round compressed tubercles. 



