384 P. CAMERON. 



moderately wide, stoutly erenu later! furrow ; lateral furrows wide, deep, smooth. 

 Suturiform articulation and the following 2 furrows closely crenulated ; the 4th 

 furrow almost smooth. Facial furrow wide, deep, leaching to the middle. 



Hub. — Demerara. (Rev. Mr. Harper). 



1 l»li tau lav Mathewi sp. nov. 



Black; entirely smooth and shining, the basal 4 segments of the abdomen and 

 the base of the 5th narrowly, vermillion red ; the wings uniformly dark fuscous, 

 with black stigma and nervures. 9 . Length 8 mm.; terebra 2 mm. 



Face, cheeks and malar space thickly covered with long white pubescence; the 

 face shagreened. Palpi black, covered with white pubescence. Temples oblique, 

 rounded behind, the occiput almost transverse in the middle. Abdomen smooth 

 and shining; central part of 1st segment longer than wide, rounded at the base 

 and apex ; the lateral furrows wide, with 3 stout abbreviated keels on the inner- 

 side in the centre. All the furrows are wide, deep and smooth ; the area on the 

 2nd segment forms an elongated triangle — longer than its width at the base — 

 ami ending in a distinct keel, which ends shortly beyond the middle of the seg- 

 ment; it is surrounded by a wide furrow, with three, stout, oblique keels in the 

 centre; the lateral depression on the segment is wide and deep. Suturiform 

 articulation smooth, wide and deep. Third abscissa of radius slightly curved 

 upwards, a little longer than the basal two united. Calcaria white. The oblique 

 furrow on the mesopleurje is distinctly defined and extends to the middle. The 

 abdomen forms an elongated oval. Frontal furrow distinct, deep, reaching to 

 the antenna?. 



Hub— West Coast of Mexico. (G. F. Mathew, R. N.) 



Iphianlax occi dental is sp. nov. 

 This species agrees so closely in size and coloration with /. 

 Mathewi; described above, that it might easily be mistaken for its 

 male. It may be readily known from it by structural characters, 

 as follows : 



Plate on second abdominal segment with the terminal spine as long as it; a 

 short but stout keel issuing from the middle of the suturiform articu- 

 lation ; lateral furrows on first abdominal segment with six short, 

 broken, transverse keels occiden tali*. 



Plate on second abdominal segment with the spine much shorter than it ; no keel 

 issuing from the suturiform articulation ; the keels on the sides of the 

 first abdominal segment not broken, stout Mai lietvi. 



Head and thorax densely covered with long white hair (in Mathewi the pubes- 

 cence is short and sparse). Face alutaceous, opaque. Temples straight, obliquely 

 narrowed, if anything longer than the autennal scape. Frontal furrow clearly 

 defined, extending from the antennae to the ocelli. Malar space furrowed, 

 shorter than the antennal scape. Pleural furrow wide, shallow, extending from 

 the base to the apex. The furrow surrounding the plate on the 2nd abdominal 

 segment is wide and deep, and bears L! stout, longish, oblique keels; the apex of 

 the depression is broadly rounded. Suturiform articulation wide, smooth and 



