160 DIPTERA OF NORTH AMERICA. [PART IV. 



tudinal grayish line, in the middle ; the sides of the mesonotum 

 and two stripes on the pleurae, dark brown ; abdomen brown ; 

 halteres pale ; femora dark brown, except the basis of the anterior 

 ones, and a pale band some distance before the tip ; the tips of the 

 tibiae and of the tarsi likewise infuscated ; wings with a slight 

 brownish-gray tinge ; a brown band runs along the central cross- 

 veins ; broad at the anterior end, it soon becomes narrow ; tips 

 of all the veins with small gray clouds ; similar clouds on the 

 discal cross-vein, and at the inner end of the third posterior cell : 

 the clouds at the tip of the first and of the second longitudinal 

 veins are larger; the fifth longitudinal vein is infuscated and 

 clouded at the two intervals before the great cross- vein ; the 

 cloud on the second infuscation, in connection with a large cloud 

 on the anterior margin and another cloud at the tip of the seventh 

 longitudinal vein, form an interrupted transverse band ; the veins 

 are infuscated, wherever there is a cloud upon them ; in the 

 intervals of the clouds the veins are yellowish. 



Hab. Washington, D. C. Caught in numbers. 



The position of the clouds is exactly like that in the preceding 

 species ; only the tinge of the wings is darker, and the clouds 

 larger and darker. The coloring of the body of both species is 

 also very similar ; only that of E. graphica is darker (compare 

 the observations at the end of the preceding species). 



** The fork of the posterior branch of the fourth longi- 

 tudinal vein (containing the third posterior 

 cell) has an angular anterior branch, which 

 emits a stump of a vein inside of the discal 

 cell: subgenus Hoplolabis (cornp. p. 152). 



10, E. arnnata 0. S. % and £. — Fuscana; abdominis segmentorum 

 margines postici pallidi ; pedes pallidi ; alae fused maculatse ; venae 

 truncus abruptus, in cellulam discoidalem porrectus. 



Brownish ; hind margins of the abdominal segments pale ; feet pale ; 

 wings with brown spots ; a stump of a vein inside of the discal cell. 

 Long. corp. 0.23—0.25. 



Syn. Erioptera armata 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 227. 



Body brownish ; thorax yellowish -gray above ; stripes indis- 

 tinct ; knob of the halteres infuscated ; abdomen brown, hind 

 margins of the segments pale ; feet yellowish. Wings (Tab. I, 

 fig. 18) with five or six brown spots along the anterior margin; 



