174 INSECUTOR INSCITI^ MENSTRUUS 



to grayish, all other head hairs black. Proboscis largely brownish-red. 

 Humeri, rather broad lateral and hind borders of mesoscutum rufous- 

 yellow, rest of mesoscutum greenish-black ; vittae very faint, middle ones 

 linear, outer ones heavy, eJl much abbreviated. Scutellum and abdomen 

 deep bright rufous throughout, the venter shading lighter. Femora slightly 

 lighter than venter, slightly darker than pleurae ; tibiae deep bright yel- 

 low on outside, rest rust-yellow with fulvous short pile, latter most thickly 

 placed on front aspect of front tibiae and hind aspect of hind tibiae, tibial 

 spines black ; tarsi wholly deep yellow, with fulvous hairs and short 

 spines. Wings deeply infuscated throughout, narrowly fulvous at extreme 

 roots on veins ; both scales of tegulae watery-whitish, borders of front 

 scale fuscous. 



Type, TD4 1 72 (fly, straplike uterus, black maggots). Among the 

 cotypes is TD4 167. 



Eulasiopalpus obscunis, new species. 



Length of body, 12 to 14 mm.; of wing, I 1.5 to 12.5 mm. Ten 

 males and one female, Matucana, about 8,000 feet, August 16, 1913, 

 on flowers of a shrubby mint. 



Differs from E. corpulenius in being decidedly more melanic, so much 

 so that it cjin not be considered a subspecies of that form. Head and 

 thorax decidedly blackish, wdth a faint greenish tinge above, all very 

 thinly silvery pollinose; cheek grooves and peristomal borders fulvous- 

 yellow. Frontalia soft brown ; first two antennal joints, lunula, and eurista 

 shining brown; third joint dark brown, with a feiint grajnish bloom. 

 Sometimes the first two antennal joints are quite rufous. Palpi fulvous- 

 yellow, ciKa black. Thoracic vittae of same pattern as in preceding spe- 

 cies, but a little more distinct. The humeri and lateral borders of meso- 

 scutum are at best faintly brownish-rufous, and scutellum is conspicuously 

 so. Abdomen is deep dark rufous, front borders and median triangles 

 of segments shining dark browTi to black, a very thin sheen of silvery seen 

 in oblique view. Venter blackish with silvery bloom, except edges and 

 ventral plates rufous. Femora light rufous; tibiae slightly lighter but 

 bright yellow on outside, tarsi wholly bright light yellow, spines and hziirs 

 same as in preceding. Wings very deeply smoky throughout, almost 

 black; hind scale of tegulae watery-white, front scale rather fuscous- 

 watery with deep black narrow border. 



Type, TD4 1 76 (fly, straplike uterus). 



