THE MYCET0PHILID,g5 OF NORTH AMERICA. 253 



long as the diameter of tibia, several rows on each tibia, six to 

 eight on the fore, eight to twelve on the intermediate, and twelve 

 to fifteen setae on hind tibia in each row. Tarsal claws with 

 teeth. Fore metatarsus is about .8 as long as the tibia. Wings 

 (fig. 86) hyaline, yellow tinged; veins dusky yellow; subcosta 

 ends opposite or slightly beyond the base of the radial sector, 

 R2+3 oblique, coalesced part of the media about half as long as 

 the petiole, anal reaches the margin of the wing. Halteres 

 yellow. Two specimens from Dewatto, Washington, collected 

 by Prof. Aldrich. This species seems to be closely related to 

 ptdlata Coq. 



5. Platyura liirida Coquillett. 

 1895. lurida Coquillett. Canad. Ent. 199. 

 Female. Length 6 mm. Head and antennae black, first two 

 joints of the latter and the mouth parts somewhat yellowish. 

 Thorax, pleura, scutellum, abdomen and legs, pale yellow, the 

 tarsi toward the apex brownish yellow, the thorax marked with 

 three reddish yellow vittae. Wings hyaline, slightly tinged with 

 yellowish toward the costa, otherwise unmarked ; tip of sub- 

 costal vein nearly twice the length of the humeral crossvein 

 beyond the base of the radial sector; subcostal crossvein nearly 

 three times the length of the humeral beyond the latter; R2-I-3 

 oblique, ending its own length beyond the tip of Ri; anal vein 

 reaches the wing margin. Washington. 



6. Platyura- pictipennis Williston. 

 1896. pictipennis Williston. Trans. Ent. Soc. London. 257. 

 Male and female. Length 3-3J mm. Front and face yellow- 

 ish or brownish, the palpi darker colored. Antennae brownish, 

 about as long as the thorax, moderately compressed. Thorax 

 yellow ; the dorsum, save a yellowish spot or stripe in the mid- 

 dle, and the yellow lateral margins, brown or black ; disk and 

 sides of the metanotum brown. Abdomen brown or blackish- 

 brown, the posterior margin of each segment yellow. Legs, 

 including the coxae, yellow, the distal portion of the tibiae, and 

 the tarsi, brownish ; tibiae without spines ; front tibiae and meta- 

 tarsi of nearly equal length ; the hind metatarsi shorter than 

 their tibiae ; all the tibiae with a single spur. Wings nearly 

 hyaline, with markings as follows : a large brown spot, reaching 



