Mr. J. R. Mallocli on E.votk Mascaridre. 229 



short ; hypopleura with the usual hairs below spiracle. 

 Abdomen narrow, subcylindrical; upper hypopygial forceps 

 rather lonj?, acute at apex ; basal sternite bare ; fifth 

 steruite with a deep V-^liaped incision. Fore tibia with a 

 long fine median posterior bristle ; fore tarsus longer than 

 tibia; mid-femur witli a series of long bristles on postero- 

 ventral surface; mid-tibia with four long posterior bristles ; 

 hind femur with long bristles on apical half of antero- 

 ventral surface, the series duplicated in part; postero- 

 ventral surface bare ; hind tibia with some long bristles on 

 apical half of antero-ventral and antero-dorsal surfaces, 

 some of them invading the anterior surface. Outer cross- 

 vein almost S-shaped ; veins 3 and 4 divergent at apices. 



Female. — Frons less than one-third of the head-width at 

 vertex, widened anteriorly; a series of setulae descending 

 on parafacial below apex of second antennal segment. 

 Legs with stonter and shorter bristles than in male, the 

 hind tibia with one antero-ventral and two antero-dorsal 

 bristles. 



Length 7-8 mm. 



Type, male, and allotype, north of Mt. Kenia, 18. ii. 

 191 1, 8300 feet. Paratvpe, male, west of Mt. Kenia, 19-20. 

 ii. 1911, 6500-7250 feet (T. J. Ander on). 



The African species Mi/daa nemoralis. Stein, probably 

 belongs to the genus Spiluria, and may be separated from 

 the species listed in this paper by its having four pairs of 

 postsutural dorso-ventral bristles, and the cross-veins not 

 noticeably iufuscated. Stein has placed his species as a 

 synonym of mulcata, Giglio-Tos, a ^Mexican species, but I 

 am inclined to doubt this. I have not seen nemoralis, Stein. 



Genus Idiopygus, nov. 



Generic characters. — Similar to Heiina, R.-D. Differs in 

 having the superior and inferior hypopygial forceps of male 

 long and slender, and the fifth sternite very deeply cleft in 

 middle of posterior margin, giving it the appearance of 

 having two long latero-posterior processes, the general 

 liabitus of the hypopygium similar to that of some species 

 of Ccenosla and Pyyophora. The fourth visible tergite of 

 female is not ehitinised and transverse at apex, but depressed 

 and somewhat membranous, sometimes notched in centre of 

 posterior margin. The anterior intra-alar bristle is absent 

 or distinctly caudad of the anterior postsutural dorso- 

 central. Hypopleura either bare or with some minute hairs 



