CHIRONOMID MIDGES OF CALIFORNIA — SUBLETTE 93 



June, 1946, B. Brookman. In UCD: 1 male, Bear-Cache Creek 

 Junction, Yolo Co., Apr. 19, 1957, S. 



The genus Thienemannimyia Fittkau, 1957, was established for 

 Edwards' Group C, in part. Fittkau's generic diagnosis (freely trans- 

 lated) includes a "leg with a brown ring at the end of the femur and 

 on the base of the tibia; the last 2 or 3 tarsal segments brownish. Wing 

 mostly with darkened cross veins and dark flecks or bands. . . . 

 Hypopygium of a very uniform structure" (Fittkau, 1957, figs. 3, 4). 



Of the described North American species only P. barberi (Coquillett), 

 P. marmorata Johannsen, P. apicalis (Walley), P. ornata (Meigen) 

 Johannsen, and P. pulchripennis (Lundbeck) definitely belong to this 

 restricted genus as indicated by characteristics described by Johannsen 

 (1946). 



Roback (1957) has described Pentaneura norena, a species obviously 

 belonging to Thienemannimyia, as evidenced by the structure of the 

 male genitalia and by the banded wings; however, the species lacks 

 leg fasciae. Thienemannimyia must thus be emended to include both 

 species with fasciate legs and those without fasciae. The remaining 

 species treated by Johannsen (1946) as members of Group C^ — ^that 

 is, those with unhanded legs^ — ^possibly may include also species that 

 properly should be placed in Thienemannimyia; however, in the absence 

 of hypopygial illustrations in the literature, none of these can be 

 verified at this time. These species of uncertain position include 

 P. bifasciata (Coquillett), P. Jragilis (Walley), P. futilis (Wulp), P. 

 carnea (Fabricius) Johannsen, and P. sinuousa (Coquillett). Because 

 of lack of precise knowledge of many North American types of this 

 group, I am not using Thienemannimyia at this time but am using a 

 much more inclusive Pentaneura (Pentaneura) (==Groups B-F, 

 sensu Edwards.) 



Pentaneura {Pentaneura) comosa, new species 



Figure 2a 



Holotype male: USNM 65506, Almn Rock Park, Santa Clara Co., 

 July 8, 1948, W. 



Head pale yellowish-white; posteriorly infuscate. Antennal pedicel 

 and flagellum dark brown. Eyes with long narrow dorsal extensions. 

 Palpi long, pale bro^vn, ratio 35:43:45:70. Antennal ratio 1.52. 



Thorax brown overlaid with strong white pruinescence ; vittae dark 

 brown, overlaid with conspicuous greenish pruinescence. Pronotum 

 infuscate yellowish-white with broad notch completely interrupted 

 on midline; with 4 fine lateral bristles. Scutellum infuscate yellow. 

 Postnotum dark brown. Sternopleuron dark brown marked with 

 infuscate yellow on pleura. Halteres yellow. Supra-alar bristles 2, 

 1 long, 1 short ; prealar bristles 1 1 ; dorsomedial bristles staggered in 



