6 PEOCEEDIS"GS OF THE NATIONAL MUSEUM vol. 75 



greatly indebted for the opportunity of studying not only the present 

 material but other rich collections from many parts of the Americas. 



BRUCHOMYIA PERUVIANA, new species 



General coloration dark gray, the vestiture whitish; rostrum and 

 palpi dark brown; antennae (female) 29-segmented, the basal 15 or 

 16 flagellar segments subequal in length; femora with appressed 

 whitish setae. 



Female. — Length, about 4.7 mm.; wing, 5 mm. 



Rostrum and palpi dark brown. Antennae with the scapal seg- 

 ments pale yellow, the flagellum dark brown, 29-segmented, including 

 the microscopic terminal button; first flagellar segment subequal in 

 length to the second; proximal 15 or 16 flagellar segments nearly 

 equal in length but becoming more slender, the ends a little con- 

 stricted; succeeding segments gradually shortened, the outer seg- 

 ments more oval; terminal segment buttonlikc; antennae much shorter 

 than in the corresponding sex of shannoni. Head dark plumbeous 

 gray. 



Mesonotum dark gray, the lateral margins of the praescutum 

 somewhat more brownish; setigerous punctures dark brown; vestiture 

 of thorax whitish. Pleura dark brown. Halteres pale, the base of 

 the stem whitish, the knobs infuscated. Legs with the coxae and 

 trochanters infuscated; femora pale, with appressed whitish setae 

 that are scarcely apparent against the background; tibiae and tarsi 

 darker; segments of legs with sparse scattered erect setae. Wings 

 yellowish subhyaline, the macrotrichiae brown; veins very pale 

 brown. Costal fringe relatively short and inconspicuous. Venation 

 as in shannoni, with the following modifications: Rs scarcely broken; 

 proximal end of distal section of R^ thickened, as in argeniina, jutting 

 as a weak spur into cell R; r-m on Mi nearly its own length beyond 

 the fork of if 1+2; J/3+4 very short and arcuated; m~cu pale, without 

 macrotrichiae; distal section of Cui sinuous, longer than the basal 

 section. 



Abdomen dark brown, densely covered with white setae, the genital 

 segments more yellowish. 



Locality. — Peru. 



Holotype. — Female, Colonia Perer^e, Chanchomayo, altitude 3.000 

 feet (R. C. Shannon). 



Type.— Fem&\e, Cat. No. 41581, U.S.N.M. 



Genus NEMOPALPUS Macquart 



1838. Xemopalpu.H Macquart, Dipt, exot., vol. 1, pt. 1, p. 85. 



1845. Nygmatodes Loew, Dipterolog. Beitrjige, vol. 1, p. 9. 



1904. Nemopalpus Eaton, Ent. Mo. Mag., ser. 2, vol. 15, p. 55. 



1905. Palaeosycorax Meunier, Miscell. Ent., vol. 13, p. 50. 



1922. Nemopalpus Tonxoir, Ann. Soc. Ent. Bclgique, vol. 62, p. 125. 



