172 INSECUTOR INSClTlylt MENSTRUUS 



about half way between small crossvein and cubitus. No medi- 

 an marginals on first segment, median discals on last three 

 segments. 



Nephoplagia arcuata, new species. 



Length, 7 to 8 mm. Three males, Huascaray Ridge, Jaen 

 Province, Peru, 7,000 feet. September 21 and 23, 1911 (C. H. 

 T. Townsend). 



Blackish-brown. Front thinly, face more thickly silvery- 

 white. Second antennal joint and palpi fulvous, with fuscous 

 shading. Thorax, scutellum and abdomen thinly silvery ; four 

 thoracic vittse, the inner pair narrow ; bases of last three ab- 

 dominal segments more or less narrowly thickly silvery-white. 

 Tegulae watery-white. Wings nearly clear, with three heavy 

 fuscous clouds : One large from stigma across middle of dis- 

 cal cell ; one smaller, barlike, on hind crossvein ; and one, spot- 

 like, on base of apical crossvein. 



Gymnopalpus, new genus. 



Genotype, Gymnopalpus setipennis, new species. 



Allied to Thclaira. Palpi of female much swollen apically, 

 wholly bare on swollen part. Arista thinly plumose to tip. 

 Third antennal joint of female slender, four times as long as 

 second. Eyes bare. Cheeks narrow, eyes descending to epis- 

 tomal level. Parafacialia bare, narrow. Apical cell open or 

 closed a little before tip. First vein bristled to tip, third about 

 two-thirds way to tip. Macrochastse heavy and erect, no medi- 

 an discals on abdominal segments. 



Gymnopalpus setipennis, new species. 



Length, 6.5 mm. Two females : One Los Amates, Guate- 

 mala, February 7, 1905 (Chas. C. Deam) ; the other without 

 locality, collected by Mr. August Busck. Det. Coq. "Chaetona 

 pallida Wulp." 



Browni.sh to black; basal half of abdomen, all of coxse and 

 all but tips of femora clear yellow to tawny or fulvous. Head 

 silvery-white, frontalia pale brown, palpi and base of antennae 

 pale yellow. Two thoracic vitta?, the pollen between them with 



