INSECUTOR INSCITI^ MENSTRUUS 75 



silvery pollinose. Frontalia brownish-rufous. Antennas black- 

 ish. Thorax black, very thinly silvery, median pair of vittae 

 visible only in front. Scutellum wholly rufotestaceous. Ab- 

 domen deep rufous throughout above and below, segments 

 3 to 4 with median blackish triangle on base. Legs same 

 rufous as abdomen, tarsi black. Wings deeply smoky through- 

 out. Hind scale of tegulse yellow-rufous, with short whitish 

 fringe ; front scale deep blackish-smoky, with long black fringe. 

 Holotype, No. 19424, U. S. Nat. Mus. TD3938. 



Euquadratosoma, new genus. 



Genotype, Euquadratosoma rubrum Townsend, new species. 



Differs from Eumelane palpus as follows : Female only de- 

 scribed. No reclinate inner fronto-orbital immediately inside 

 of the posterior proclinate one. Front at vertex occupying 

 fully one-third head-width. Cheeks fully two-thirds eye- 

 height. Proboscis beyond geniculation about two-thirds head- 

 height. Marginal row of macrochsetas of second segment 

 arcuate in middle, being bulged forward from hind margin on 

 median line. Marginal row of third segment broadly inter- 

 rupted on median line. Buttocks bunches of spines not con- 

 tinuous, well separated, the anal segment more deeply emar- 

 ginate. Joints of all the tarsi rather wide, those of front and 

 middle legs quite noticeably so. Apical cell much more widely 

 open, ending a little nearer to wing tip. 



Euquadratosoma rubrum, new species. 



Length of body, 13 mm. ; to end of spines, 14.5 mm. ; of 

 wing, 13.5 mm. One female, Ollachea, Peru, high montanya 

 of the Rio San Gaban Canyon, about 9,500 feet, February 3, 

 1910, on flowers of an euphorbiaceous shrub (Townsend). 



Differs in color from description of Bumelane palpus ruber 

 only as follows: Face and cheeks irregularly tinged with 

 rufous or testaceous. Thoracic vittse scarcely distinguish- 

 able. Scutellum narrowly edged with black on base. Abdomen 

 with a broad blackish median vitta, broadest in front, grad- 

 ually attenuate posteriorly. Femora black on basal half or 



