74 MAINE AGRICULTURAL EXPHRIMl-XT STATION. I912. 



25. B.vcchia absiirda n. sp. 

 Male. Length 3 mm. Thorax brown, pleura a little paler 

 brown, humeri yellow. Abdomen dark brown, the venter of 

 segment 2, venter and sides of 3, and hypopygium yellow 

 (Fig. 56). Fore metatarsus about i.i longer than the tibia. 

 Wing hyaline, tinged with brown (Fig. 181). Ithaca, N. Y, ! 

 and Orono, ]\Ie. Nov. 



26. ExccJiia casta n. sp. 



Male. Length 3.5 mm. Thorax and abdomen brown, the 

 latter darker brown, humeri yellow; hypopygium yellow (Fig. 

 57). Fore metatarsus about .95 as long as the tibia. Wings 

 hyaline tinged with brown (Fig. 182). 



Female. Like the male but the anterior margin of each seg- 

 ment on the venter and sides sometimes faintly tinged with 

 yellow. Black Rock Creek, Dubois,! Dinwiddle Creek, Hunt- 

 er's Creek, Wyoming (W.M.W), Sept. 



27. BxccJiia analis Adams. 



Wash. Carnegie Inst. Pub. 67. 37. 1907. ( Mycetophila.). 



Male. Length 4 mm. Head brownish black, mouth parts 

 and basal joints of antennse yellow, remaining joints of antennae 

 light brown. Thorax brownish black, lateral margins of mes- 

 onotum and pleura brownish-j-ellow, mesonotum with short 

 yellow pile and black bristly hairs, the latter distributed along 

 the sides ; scutellum with an apical pair of strong bristles. 

 Abdomen brownish-black, apex yellow, with short yellow pik. 

 Coxse yellow, femora light yellow, tibia and tarsi becoming 

 darker distally; the front tibiae without bristles except the apica! 

 ones, the second are provided with a row of indistinct setulre 

 and the hind tibi?e have rather strong bristles; front tarsi a 

 little over twice as long as front tibiae ; middle tarsi above twice 

 as long as middle tibiae, hind tarsi 1.5 times as long as their 

 tibiae. Wings nearly hyaline, Rs and anterior branch of media 

 divergent distally, furcation of media in front of base of Rs, 

 furcation of cubitus considerabl)^ posterior to it. Halteres light 

 yellow. "Mayfiekl Cave, Ind." 



The type specimen, which w^as sent to me by Dr. Adams for 

 examination, has an hyitopygiimi resembling that of B. affrita, 

 the longer process very similar to that shown in fig. 54, but 



