THE CANADIAN ENTOMOLOGIST. 11 



snowy white ; costal and apical portions brownish or dark brown, some- 

 limes dusted with white and sometimes (usually) with streaks of the white 

 extending into the brown portions, sometimes so as to divide it into two 

 or three brownish costal streaks. There is great variety in the shade and 

 proportions of the whitish and brownish portions of the wing, but snow 

 white is the characteristic color of the basal and dorsal parts and brown- 

 ish of the costal and apical parts, with the line between them more or 

 less emarginate. A/, ex. }'i inch. Kentucky. 



A. apici-niacuIeUa. N. sp. 



In this species the eye cap is as distinct as in undidafdla, but the stalk 

 is simple and slender as in or ca sella. The neuration of the primaries is 

 that given by Mr. Stainton for A. aneuthina (lot. ".if.) In the second- 

 aries it is the inferior portion of the discal vein that is absent instead ot 

 the superior, as in ujidulatella ; that is the portion next to the median 

 vein. 



Shining silvery white, each joint of the antennae (except the basal 

 one) is dotted above with dark brown. Primaries with a blackish or 

 dark brown shining almost triangular spot at the apex, with three pale 

 and indistinct brownish costal streaks before it ; the first of these streaks 

 is the shortest and most indistinct, and is placed at the beginning of the 

 ciliae. The second is a little more distinct and sometimes extends 

 entirely across the wing, and the third one always does so after dividing 

 into two branches just before the apical spot. These streaks are usually 

 more or less interrupted and sometimes spread over the apex so that it 

 might perhaps be more correctly described as dusted than streaked. 

 There is a bright though pale golden basal streak just within the costal 

 margin. Al. r.v. ^g inch. Kentucky, in oak woods, in June and July. 



THE FAMILIES OF DIPTERA. 



BY FRANXIS WALKER, LONDON, ENGLAND. 



The two-winged flies are more important in nature than any other 

 order of insects because of their number and diffusion, and the families 

 may be briefly traced in succession previous to a more extended notice 

 of each of them, in case the subject should become more interesting. 



