372 DURHAM DIPTERA. 



LI. 639. 



33 (36). A black spot above the hind coxae. 



34 (35). Abdomen banded ; arista dark. 



{Siphonella pumilionis, F.) 



35 (34). Abdomen all black above ; arista pale. 



{ephippium, Ztt.) 



36 (33). No black hypopleural spot. 



37 (38). Wings with an indistinct spot near the point. 



{maculipennis, Ztt.) 



38 (37). Wings without this spot. {Siphonella flavella, Ztt.) 



640. Siphonella, Mcq. 



1 (4). Dorsum yellow. 



2 (3). Dorsum with three broad, almost confluent, greyish 



black stripes ; a black spot above the hind coxae. 



{pumilionis, F.) 



3 (2). Dorsum unstriped, or with faint brown line ; no black 



hypopleural spot. {flavella, Ztt.) 



4 (1). Dorsum black. 



5 (6). Face wholly black. (2721. Icevigata, Fin.) 



6 (5). Face wholly or partly orange or whitish. 



7 (8). Halteres yellowish white ; third antennal joint 



orange. (2723. palposa, Fin.) 



8 (7). Halteres brown ; third antennal joint black on the 



outer side. {nucis, Per.) 



641. Elachyptera, Mcq. 



1 (2). Wings longer than the abdomen. 



2725. Elachyptera cormita, Fin. 

 Very common. 



2 (1). Wings shorter than the abdomen, almost rudi- 



mentary. (2724. brevipennis, Mg.) 



Family LII.— MILICHID^. 



1 (2). Eyes round ; dorsum with both centre and side 



bristles. 643. Milichia, Mg. (2727. ornata, Ztt.) 



Life history unknown, probably the larvae live in fungi. 



