1 64 DUEHAM DIPTEBA. 



XXVII. 369. 



24 (25). Anus exceedingly inflated and rather shining. 



(1402. ruralis, Mg.) 



25 (24). Anus moderately large. 



26 (27). Legs nearly all black, anal depression distinct, 



though small. ( I 4°3- unicolor, Ztt.) 



27 (26). Tibiae and tarsi nearly all orange, practically no anal 



depression. terminalis, Thorns. (1404) 



28 (15). It is a female. 



29 (32). Large species, 4-4^ mm. Anal depression con- 



spicuous. 



30 (31). Humeri, tibiae, and tarsi blackish brown. 



(1398. zonatus, Ztt.) 



31 (30). Humeri, tibiae, and tarsi yellowish. 



(1399. fascipes, Ztt.) 



32 (29). Not large species, 3-3! mm. 



33 (38). Tibiae and tarsi mainly darkened. 



34 (35). Moderate sized species, 3f mm. ; anus with a de- 



pression. (1400. modestus, Hal.) 



35 (34). Small species, 3 mm. 



36 (37). Abdominal side spots distinct, large, and coalescing ; 



anus without any middle channel; humeri dark. 



(140 1. Justifies, Ztt.) 



37 (36). Abdominal side spots indistinct, small, and not 



coalescing ; anus with a small middle channel ; 

 humeri yellowish. (i4°3- unicolor, Ztt.) 



38 (33). Tibiae and tarsi mainly yellowish, anal channel dis- 



tinct, frons all grey, size 3 mm. 

 1404. Pifiunculus terminalis, Thorns. 

 Bedburn, 1 ?, 7-7-02. 



39 (14). All femora shining behind, tibiae and tarsi orange, 



abdomen moderately shining about the tip in the 

 female. ( I 4Q5- obtusinervis, Ztt.) 



40 (13). Abdomen more or less shining, at least narrowly but 



brilliantly on the hind margins of segments. 



41 (42). Stigma not reaching the tip of V.I .a.; mid femora 



with slight ciliation about the tip of the hinder 

 side; legs mainly black. (1406. halteratus, Mg.) 



