210 DIPTERA OF NORTH AMERICA. [PART IV. 



an oblique stump of a vein ; subcostal cross-vein anterior to the 

 origin of the prsefurca by about four lengths of the great cross- 

 vein ; the fourth posterior cell has its inner end a little before the 

 middle of the discal cell ; a supernumerary cross-vein in the 

 middle of the second basal cell. Wings rather broad, with a 

 slight brownish-yellow tinge and numerous brown spots ; there 

 are seven larger spots along the anterior margin (one at the 

 humeral cross-vein, another a little beyond it, a third at the sub- 

 costal cross-vein, a large spot at the origin of the prsefurca, the 

 following three at the tips of the auxiliary, first and second longi- 

 tudinal veins) ; similar, but smaller spots at the tips of the veins 

 along the posterior margin, beginning with the posterior end of 

 the fork inclosing the second posterior cell ; brown clouds in the 

 axillary and spurious cells, near the posterior margin ; a spot at 

 the inner end of the second basal cell ; cross-veins and inner ends 

 of the forks clouded with brown ; the middle of the second sub- 

 marginal cell clouded. 



Eab. Labrador ; a single male. 



Observation. In reading over the descriptions of the Limnobiss 

 in Prof. Zetterstedt's Diptera Scandinaviae, Yol. X, with the view 

 of locating as much as possible all the anomalous species, I notice 

 the description of Limnobia varinervis Zett. (1. c. p. 3813), from 

 ]S"orway, which agrees in many points with A. hyperborea. It is 

 certainly an Amalopis, and possibly the same species as A. hyper- 

 borea. A. varinervis has the discal cell quite often open. 



5. A. vernalis 0. S. % and £. — Fuscana, alis fusco-maculatis ; 

 cellula submarginalis prima secunda longior ; cellula posterior quarta 

 longa, sessilis. 



Brownish, wings with, brown spots ; the first submarginal cell is longer 

 than the second ; fourth posterior cell long, sessile. Long. corp. 0.3 — 0.4. 



Syn. Amalopis vernalis 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 291. 



Head brownish-gray, front somewhat infuscated in the middle, 

 palpi brown ; antennae not much longer than the head, brown, two 

 basal joints paler ; flagellum stout at the basis, joints very short, 

 their pubescence short. Thorax grayish-yellow above, with four 

 brown stripes ; the intermediate ones separated by a delicate line ; 

 pleurae and metathorax brown, with a grayish bloom ; halteres 

 pale, the middle of the stem, and the basis of the knob infuscated. 



