120 MAINE AGRICULTURAl EXPERIMENT STATION. I912. 



hh. With o\'i,r 25 setae in this patch (Fig. 124). 



i. Abdoinen variable dark ochreous, palpi yellow- 

 ish, anterior veins dark ochreous. 



21. inultiseta. 



ii. Abdoinen variable dark brown ; palpi brown, 



anterior veins nearly black. 22. agraria. 



gg. Clasper without terminal tooth (Fig. 123) ; the hy • 



popygium with the setse of the ventral median 



patch arranged in a transverse line (Fig. 123a) ; 



halteres black. 2^. jucimda n. sp. 



ff. Hypopygium without a tuft of setae on the median 



ventral line near the base. 



g. Clasper with about 5 large subequal teeth or spines 



(Figs. 113, 119). 



h. Tip of Rs about .10 of wing length proximad of 



tip of Mo and ending proximad of .85 of wing 



length (Fig. 239); palpi and halteres dark; 



mesonotum shining black. 24. S. sp. 



hh. Tip of Rs less remote from apex of wing ; costa 



produced fully 3-4 of distance from tip of Rs 



to Mi; coxae and halteres yellow. 



25. mutua n. sp. 

 gg. Clasper of different structure. 



h. Petiole of cubitus short, less than half as long -is 

 basal section of M. 

 i. Wing veins strongly marked ; Rs ends distad oi 

 Ma) costa produced about 1-2 of distance from 

 Rs to Ml ; thorax shining, 

 j. Halteres and coxae bright yellow. 



35. nigricans n. sp. 

 jj. Halteres fuscous, (Figs. 217, 260). 



36. actuosa n. sp. 



ii. Costa produced over 1-2 distance from Rs to 



Ml, if not, then Rs ends proximad of tip of M2. 



j. Clasper with several apical teeth or spines. 



k. Clasper short, curved, with several apical 



teeth (Fig. 114) ; Ri ends at about 1-3; 



length of wing; Rs and M2 end about 



equi-distant from base of wing (Fig. 



234) ; halteres yellow. 26. nacta n. sp.. 



kk. Clasper with apical setae or spines (Fig. 



133, 261). 



I. Ri ends near middle of wing; costa pro- 



duced over half way to Mi. 



46. coprophila. 



II. Ri ends noticeably proximad of the mid- 



dle of the wing; costa produced scant 

 half way from Rs to Mi (Fig, 267). 



32. cucumeris n. sp. 



