22 PROCEEDINGS OF THE NATIONAL MUSEUM. vou SO. 



Specimens examined are from Haulover, Capron, Biscayne Bay, 

 Buena Vista, Palm Beach, and Miami, Florida, Baton Rouge, Loui- 

 siana, and from Texas (U.S.N.M.) ; Pass Christian, Mississippi 

 (Aldrich). 



The distribution of Dilophus orbatus Osten Sacken (the species 

 not being known north of the Gulf Coast) , casts additional doubt on 

 the identification of it with Bihio orbatus Say, which was described 

 from Pennsylvania. 



DILOPHUS PROXIMUS. new ipecies. 



Male. — Head, body, and legs, piceous to black, shining, with pale 

 hair, except on eyes, front tibiae and all tarsi ; genital segment cleft, 

 half its length, superior plate transverse, about four times as wide 

 as long, straight or slightly concave posteriorly ; wings hyaline, veins 

 near costa and rather distinct stigma light brown. 



Female. — Head and thorax except humeri shining black, and abdo- 

 men velvety brown, all with short pale hair ; humeri and legs chiefly 

 yellow to rufous, tibiae and tarsi, especially of the front legs deeper 

 colored, sometimes black; in pale specimens the trochanters, distal 

 tarsal joints and apices of other tarsal joints only are black, hair of 

 legs except tarsi pale; wings hyaline, veins near costa and stigma 

 brown. 



Length of wing, 3-5 mm. 



Type.—C2it. No. 24703, U.S.N.M. Male and allotype labeled 

 "Colo." (U.S.N.M.) ; paratype, male and female. Hunters Creek, 

 Wyoming, September 11, 1895 (Aldrich). 



DILOPHUS SECTUS, ii«>r ipecie*. 



Male. — Body shining black, legs brownish black; eyes with short, 

 close-set, dark hair ; body and legs with longer, sparse pale hair, ex- 

 cept on tarsi where it is chiefly dark; genital segment cleft nearly 

 to its base, superior plate about three times as wide as long, dis- 

 tinctly concave posteriorly; wings hyaline, veins near costa and 

 nearly obsolete stigma yellowish brown. 



Female. — Head shining black, with a few short pale hairs ; thorax 

 chiefly shining black with short sparse pale hairs, humeri yellowish- 

 rufous and indistinct patches on pleura and scutellum yellowish 

 brown; abdomen velvety brownish-black, with pale hairs; coxae 

 and femora yellowish rufous; trochanters tibiae and tarsi fuscous 

 to black, those of anterior legs darkest; hair of legs chiefly pale 

 except on tarsi; wings as in male, stigma somewhat more distinct. 



Length of wing, 4.5-5.5 mm. 



Type. — Cat. No. 24704, U.S.N.M. A male, Franconia, New Hamp- 

 shire, A. T. Slosson; allotype, same data; paratype, female, White 

 Mountains, Morrison (U.S.N.M.). 



