P'UNGUS GNATS Ol'" NORTH AMERICA. 6/ 



jj. Postero-ventral angles each with several 

 setae; the broader forceps with blunt apex 

 and a tuft of setas on the preapical angle 

 (Fig. 52). 21. capillata n. sp. 



gg. Postero-ventral angles of hypopygial sclerite with- 

 out several conspicuously strong setse or spines, 

 h. One pair of the hypopygial appendages curved on 

 apical third and conspicuously longer than the 

 others. (Fig. 53) ; dark brown species. 



22. obediens n. sp. 

 hh. Two pairs of appendages subequal in length. 



i. Appendages iniusually slender ; one pair blunt, 

 each limb of the other pair with a long sub- 

 basal branch (Fig. 54b); thorax brown: 

 abdomen with yellow. 23. attrita n. sp. 



ii. Appendages otherwise. 



j. The more slender forceps with several apical 

 set£e (Fig. 55) ; pleura in part yellow. 



24. re panda n. sp. 

 jj. Slender forceps without apical setae. 



k. Abdomen with yellow markings at base of 

 venter; hypopygium (Fig. 56). 



25. absurd a n. sp. 

 kk. Abdomen brown; hypopygium (Fig. 57). 



26. casta n. sp. 

 E. aiialis Coq. belongs to Mycothera. 



General description of Species' of Bxeckia. 



The species described below, unless specifically stated to the contrary, 

 possess the following characters in common : 



Head and antennas fuscous, the scape and base of the first flagellar 

 joint and the palpi yellow. Dorsum of the thorax fuscous apparently 

 consisting of 3 confluent stripes, leaving the humeri yellow; scutellum 

 and metanottmi fuscous: hairs pale, setse blackish; scutellum with 2 

 black setse. Dorsum of abdomen fuscous, hypopygium yellow. Coxae 

 and legs yellow, the tibia; dusky yellow, spurs and tarsi infuscated. 

 Subcosta short, ends free ; venation as figured. Halteres yellow. 



Although the ovipositor of the female ofifers good specific characters, 

 descriptions are only given of those females which are definitely asso 

 ciated with males. 



T. ■ B. re cilia perspicua n. sp. 

 Male. Length 3.25 mm. ' Pleura brown. Abdomen brown, 

 the posterior segments darker brown ; appendages of the liy- 

 popygium (Fig. 31) slender; terminal ventral sternites, paired, 

 rectangular. Fore metatarsus over 1.15 the tibia in length. 

 Wing dusky hyaline (Fig. T59). Sage Creek, Wyo.. 

 (W.M.W.) Sept.; Orono, Me. ! Oct. 



