DIPTERA. 375 



Subfam. TACHYDEOMIINJE. 



PLATYPALPUS. 



Platypalpus, Macquart, Dipt, du Nord France, 1827, p. 92. 



1. Platypalpus trivialis. 



Platypalpus trivialis, Loew, Cent. v. no. 76 \ 



Hab. North America, Maine 1 . — Mexico, Omilteme in Guerrero 6000 to 8000 feet 

 (H. H. Smith). 



Four females from Guerrero are referable to this species, but they differ from 

 northern specimens in their larger size (length 3 millim., wing 5 millim.), longer, pure 

 yellow legs, not darker at the tips of the tarsal joints, and lighter venter. One of them 

 has the sides of the notum and the pleura? reddish. 



TACHYDEOMIA. 



Tachydromia, Meigen, in Illiger's Mag. ii. p. 269 (1803). 



1. Tachydromia schwarzi. 



Tachydromia schwarzii, Coquillett, Proc. U.S. Nat. Mus. xviii. p. 440 (1896) \ 

 Hab. North America, Utah 1 .— Mexico, Guerrero (H. H. Smith). 



Three specimens from Guerrero appear to belong to this species. The slight 

 differences of lighter-coloured legs and broader submarginal cell are not of sufficient 

 value for the erection of a new specific name. 



PHONEUTISCA. 



Phoneutisca, Loew, Berl. ent. Zeitschr. vii. p. 19 (1863). 



1. Phoneutisca simplicior, sp. n. 



$. Black, shining; legs yellow. Antenna short, black; third joint shorter than the second; style four 

 times as long as the antennae. Eyes contiguous on the face. Vertex broad, black, with purple tinge. 

 Palpi whitish. Proboscis black, short, equal in length to one-third of the eye-height. Thorax shining 

 black, with faint purplish reflections; pleurse slightly pruinose. Halteres pale yellow. Abdomen 

 depressed, black, with a bronze tinge. Legs, including the coxaj, yellow ; anterior femora incrassate ; 

 tarsi darker on the last joint. Wings cinereous-hyaline, unspotted ; veins strong, fuscous, third and 

 fourth straight, slightly divergent. 



Length 1*5 millim., of the wing 1-5 millim. 



Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H Smith). 



