602 PROCEEDINGS OF THE ACADEMY OF [Oct., 



Dicranotse. The resemblance of this insect to species of Polymera 

 is remarkable. 



Tribe Hexatomini. 

 Geuus ERIOCERA Macauuri. 

 1838. Eriocera Mac-quart; Dipt, exot., vol. 1, No. 1. p. 74. 

 Eriocera tristis sp. n. 



Abdomen shining black; wings with a blackish suffusion; cro.s.s- 

 vein r at the fork of R,+z. 



Female, length, 12 mm.; wing, 10 10. S nun. 



Rostrum and palpi brown. Anteima? reddish brown. Head 

 dark brownish black, much paler, yellowish, along the margin of the 

 eye and a pale spot behind the frontal tubercle. Frontal tubercle 

 conspicuous, shiny, without hairs, dee]) chestnut-ljrown with a 

 \'-shaped notch in front. 



Thorax with the pronotum dark brownish black; mesonotum 

 very dark brown with four indistinct blackish stripes, the middle 

 pair longest, divergent in front, the lateral |)air abbreviated; scutum 

 and scutellum brown, the latter with a sparse gray bloom; postnotum 

 black. Pleura dark brown. Halteres dark brownish black. Legs, 

 co.xse brown, trochanters dull yellow, femora full yellow at base, 

 darkening into brown at the swollen tips; tibiiE reddish brown, 

 tarsi brown. Wings blackish brown, stigma oval, dark brown; 

 venation: cross-vein r at the fork of R2+2; cell 1st M2 small, almost 

 square; basal deflection of Cih beyond the fork of M. (The venation 

 is figured in Psyche, vol. 19, pi. 13, fig. 8; 1912.) 



Abdominal tergites dark shiny black, the terminal segment and 

 the ovipositor reddish brown; sternites yellowish, apices of the 

 segments dark brownish black, sometimes the yellow color indistinct. 



Holotype, <f, Fall Creek, Ithaca, N. Y., August 1, 1912 (Alex- 

 ander) . 



Allotype, 9 , topotypic. 



Paratypes, 1 9 , topotypic, (Carl Ilg). 2 9 , topotypic (Carl Ilg.). 



I examined the types of fuliginosa 0. S. on September 11, 1913. 

 The wing is suffused with rather light bro\vn; stigma small, rounded, 

 brown; cross-vein r just beyond the fork of R2+3. E. tristis ma>- be 

 told by the very dark color of the wings and the deep black abdomen; 

 this is the species mentioned by me in Psyche, December, 1912, 

 p. 1G9, untler the account of E. fultonensis. 



