164 DIPTERA OF NORTH AMERICA. [PART IV. 



Rostrum and pdpi brown ; antennas brown, two basal joints 

 pale yellowish ; joints of the flagellum in the female rather 

 elongated, almost cylindrical ; in the male they are shorter ; front 

 brownish, with a gray bloom (the male has some yellow on the 

 vertex). Thorax pale brownish above ; stripes generally obsolete 

 in front, sometimes visible on the posterior portion of the meso- 

 notum ; humeri with rather conspicuous sulphur-yellow spots ; 

 halteres infuscated, except their basis, which is pale ; feet brown, 

 coxae and basis of the femora yellowish ; abdomen brown, with 

 golden-yellow hairs ; its tip, including the male forceps, is yellow- 

 ish ; horny appendages of the male dark brown ; ovipositor fer- 

 ruginous ; wings immaculate, with pale veins and a brownish 

 pubescence. 



Hob. South Orange, 1ST. J. ; three specimens. 



This species is most closely related to the former, but will be 

 easily distinguished by its paler coloring, the yellowish basal 

 joints of its antennae, the more elongated joints of the flagellum 

 in the female, the more distinct sulphur yellow spot on the 

 humeri, etc. 



In both of these species the males seem to be comparatively 

 rare. Having found recently a male specimen of E. fo?*cipula, 

 I examined its forceps, which has a very peculiar structure : 

 rather large, broad at the basis, showing several coriaceous 

 appendages, the outer ones linear, the inner ones somewhat 

 foliaceous ; each half of the forceps bears a pair of brown horny 

 appendages, curved against each other, so as to form a separate 

 little forceps, which opens and shuts when the large forceps is in 

 motion. 1 



16. E. ursina 0. S. % . — Nigrescens, pilis longis xrigris vestita. 



Blackish., clothed with long black hairs. Long. corp. 0.08. 



Syn. Erioptera ursina 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 228. 



Grayish-black ; the body, the veins, and the posterior margin 

 of the wings covered with long, black hairs, which appear golden 

 in a reflected light; halteres, antennae, and feet black. The 

 venation is peculiar and different from that of the two preceding 



1 E. forcipula has been added since this volume is in press ; for this 

 reason it has not been comprised in the numerical data given on pages 

 35 and 36. 



