OF WASHINGTON, VOLUME XVII, 1915 109 



2. Abdomen much longer than broad, both sexes with a median marginal 



pair of macrochsetse on second segment, usually marginal row of 

 evenly-placed macrochsetse on third segment, all macrochsetse decid- 

 edly strong; cheeks nearly one-half eye-height in both sexes; front 

 prominent in both sexes, the parafacials broad and usually polished 

 in male; eyes of male usually not contiguous, the frontalia normally 

 visible between them; female front at vertex little less than one eye; 

 wings of male normally strongly tinged throughout with deep fus- 

 cous-golden, those of female for'most part clear; apical cell normally 

 ending in exact wingtip, never petiolate, practically always closed 

 in male, often narrowly open in female; insertion of hind crossvein 

 nearly in middle in both sexes; claws of male normally very elongate 

 and lower border of head usually bulged behind eyes; parafacial 

 hairs outside marginal row usually vestigal in female, well developed 

 in male; male with soft blue-black coat over parafrontals, mesoscu- 

 tum, scutellum and first two abdominal segments, leaving rest of ab- 

 domen and broad median vitta of first and second segments metallic 

 dark green, female without such coat. . . .ENNYOMMOPSIS (new genus) 



nigrifrons 



Abdomen scarcely longer than broad, female without median marginal 

 pair of macrochsetse on second segment; third segment never with an 

 evenly-placed row but only with a median and two lateral marginal 

 pairs, all macrochsetse decidedly delicate ; cheeks hardly one-third eye- 

 height in both sexes; parafacials never polished and always compara- 

 tively narrow, the front normally not prominent but very sloping in 

 both sexes; eyes of male normally contiguous, the frontalia not show- 

 ing between them; front of female at vertex much less than one eye; 

 wings nearly clear in both sexes, apical cell normally ending slightly 

 before exact tip and often short-petiolate especially in male; lower 

 border of head not bulged behind eyes, parafacial hairs usually marked 

 in both sexes 3 



3. Insertion of hind crossvein in male normally conspicuously nearer 



to small crossvein than to bend of fourth vein, in female usually more 

 nearly in middle; parafacials comparatively very narrow; claws of both 

 sexes nearly equal; soft blue-black coat of thorax showing on first 

 two abdominal segments in male, not in female. 



EULCEWIA ^new genus) globosa (Subgcnus A) 



Insertion of hind crossvein nearly in middle in both sexes; front in 

 both sexes sloping but subprorninent, the parafacials considerably 

 broader than in preceding; claws of male rather elongate; soft blue- 

 black coat of thorax scarcely showing any tinge on first two abdomi- 

 nal segments in either sex. 



Eu'oewia madrensis new species (Subgenus B) 



4. Eyes of both sexes absolutely bare of hairs; apical cell well open; eyes 



not contiguous in male, the frontalia visible between them; female 

 front at vertex conspicuously less than one-third head-width 11 



