452 ENTOMOLOGICAL NEWS. [Dec., '15 



individuals the mesonotum is black, the scutellum is much 

 smaller than usual, nearly semi-circular, not broader than long. 

 The other specimen (Alamogordo, N. Mex., May i) is almost 

 entirely yellow, with antennae, vertex, three broad subcoalesc- 

 ing mesonotal stripes, the middle one abbreviated posteriorly 

 and the others anteriorly, and a median series of small spots 

 on the apices of abdominal segments, black. This may prove 

 to belong to a distinct species, but it is similar in other re- 

 spects to the remainder of the series. A peculiarity in one of 

 the former series (Alamogordo, N. Mex., May i) is the ab- 

 sence of the posterior cross vein in one of the wings, the sec- 

 ond posterior vein curving from the sixth vein so as to keep 

 its original position in entering the margin of the wing. This 

 may possibly be regarded as a point towards establishing an 

 affinity with the Empididae. 



In the U. S. National Museum are 2 females with the same 

 data as those of the typical series, but collected on flowers of 

 Purshia tridcntata; also a female from Bright Angel, Colo- 

 rado Canyon, Arizona, 2300 ft. alt., May 10, 1903 (H. S. Bar- 

 ber). The former two may belong to the original typical 

 series. 



Mythicomyia flavipes new species. Figs. 1 and 2. 



$ . Black, densely gray pruinose and moderately long white pilose. 

 Frons, face, cheeks, oral margin, second antennal joint, humeri, post- 

 alar spot, margin of scutellum, halteres, several spots beneath wings, 

 narrow apices and broad lateral apical angles of abdominal segments, 

 venter, hypopygium, apices of fore coxae, all legs except apices of tarsi 

 and basal spot above on femora, and veins of wings, yellow. 



Line of demarcation of upper and lower facets of eyes distinct. Pro- 

 boscis protruding beyond length of head. Third antennal joint three 

 times as long as second, hardly as broad, attenuated at both extremities ; 

 style one-third as long as third, conical. Anal cell closed. Tarsi not 

 notched. Length, 2 to 3 mm. 



Q . Similar but pile shorter. Yellow and densely pruinose with eyes, 

 ocellar tubercle, third antennal joint and style, mesonotum except broad 

 lateral margins and a divided quadrate spot near base of scutellum, 

 pleural spots, narrow bases of abdominal segments, black. Proboscis 

 and tarsi brown. 



.^ $ , El Paso, Texas, April 4, 1902. [A. N. S. P. No. 

 6097]. 



