328 SUPPLEMENT. 



8. Sixth and seventh segments of the female abdomen forming part of 



the shining black ovipositor ; fan-like row of bristles in front of the 



m halteres light yellow nigrocaudatus, sp. n. 



Sixth and seventh segments of the female abdomen like those preceding. 9. 



9. Front femora with black hair, long and abundant cauillatus sp. n. 



Front femora with white hair, shorter and less abundant ; hind femora 



slender anonymus, sp. n. 



3. Asilus (s. str.) tenebrosus, sp. n. 



6 2 • Front brownish-yellow- or ochraceous-pollinose, blackish in the middle, with black bristles. Antennas 

 black, the second joint largely reddish ; tbird joint a little longer than the first two together ; style 

 slightly shorter than the third joint. Face pollinose, like the front, the very prominent gibbosity largely 

 bare ; bristles of the gibbosity abundant, black, those of the immediate oral margin often white. Beard 

 white ; bristly hairs of the palpi black ; bristles of the upper part of the occiput black and fulvous. 

 Thorax with reddish-ochraceous pollen ; mesonotum in the middle with a broad, coffee-brown stripe and 

 two spots on each side of the same colour, all more sericeous and lighter when viewed obliquely; bristles 

 of the posterior part of the mesonotum black, those of the fan-like row in front of the halteres yellowish, 

 as are also the two on the margin of the scutellum. Abdomen opaque yellowish-ochraceous, more or less 

 sericeous, according to the light in which it is viewed ; bristles of a yellowish colour ; the moderate-sized 

 hypopygium of the male reddish ; ovipositor shining black. Legs yellowish-red ; the femora on their 

 front part black, the tarsi deeper red and blackish. Wings yellowish-hyaline ; the distal part, from the 

 base of the second submarginal cell, the interior of the third, fourth, and fifth posterior cells, and the 

 outer part of the anal cell, brown ; veins along the middle in front brownish. Length 16-18 millim. 



Hal. Mexico, Omilteme in Guerrero 8000 feet (H H Smith). 



Two specimens, male and female, which I describe as typical. Two others from the 

 same locality, one of each sex, are of a browner colour, and have the markings of the 

 wings paler ; they are also smaller. Two more, male and female, from Omilteme, are 

 of the size of the last, but are lighter coloured than the types, with the black of the 

 legs less extensive and the markings of the wings mere brownish clouds. I believe 

 that they all belong to the same species. 



4. Asilus (Heligmoneura) truquii. 



Asilus {Mochtherus) truguii, Bellardi, Saggio etc. ii. p. 52 \ 

 Asilus (Philonicus) tceniatus, Bellardi, loc. cit. p. 55 2 . 

 Neomochtherus plebeius, O. Sack, antea, p. 209 3 . 



Hob. Mexico 12 , Northern Sonora (Morrison^ Chilpancingo and Tixtla near Amula 

 in Guerrero (H. H. Smith), Guadalajara, Jalisco (Schumann). 



Twelve specimens. The amount of black on the legs is very variable, agreeing with 

 the several descriptions referred to above, without other differences. The black 

 bristles on the lower part of the face in the more melanotic specimens are numerous ; 

 in others they are wholly wanting. I have no doubt but that all these examples 

 belong to one species. A. truquii and A. tceniatus were included by Osten Sacken in 

 his list of unidentified Mexican species (antea, p. 210). 



