OF WASHINGTON. 83 



from the ctibitus ends in the median much before the forking of the 

 latter vein. The hind wings are but little shorter than the fore pair, 

 and have both radial sector and median vein forked, and reaching the 

 posterior margin. 



Type: A. lowii Klapalek. 



This genus was supposed by the author to be based on 

 A. lit tea Wallengren, but it has been shown that. Low's species 

 was not the same. Enderlein has recently* 1 made a new genus 

 Helicoconis for A. lutea,but the differences, in my opinion, 

 are altogether, too slight to be of generic importance ; the exotic 

 species he places in this genus probably represent two new 

 genera. 



Aleuropteryx walshi, n. sp. (PI. VI, figs. I, 2). 



Head yellowish; antennae yellowish, short, of about 24 joints; thorax 

 brownish ; abdomen yellowish brown ; legs brownish, hind tibia not 

 swollen, tarsi long and slender. Wings pale, somewhat mealy (speci 

 men partly rubbed), margins with long cilia, those on costal margin 

 shorter than elsewhere. Wings with venation as figured, the cross- 

 veins in groups, the cross-vein from subcosta to radius only a little 

 beyond that closing discal cell; four basal cross-veins present; in the 

 hind wings the radial sector arises near the base of wing and is 

 forked before the oblique cross-vein closing the discal cell ; the median 

 and cubitus in basal half of wing run close together. 



Length, 4.5 mm. 



One specimen from Agricultural College, Mich., 3 July 

 (Pettit Coll.). It appears to be more like A. lowii than like 

 A. lutea. 



Genus MALACOMYZA Wesmael. 



Malacomyza Wesmael, Bui. Soc. Sci. Bruxelles, in, pp. 166, 214, 1836. 

 Sciodus Zetterstedt, Ins. Lapp., p. 1050, 1840. 

 Aleuronia Fitch, Nox. Ins. N. Y., i, p. 97, 1856. 



Head longer than broad, much smaller than the thorax; second joint 

 of male antennae simple ; tibia of middle and hind legs slightly swollen 

 in middle. Fore wings rather shorter than in the other forms, radial 

 sector and median vein both with one fork, the connecting veinlet from 

 the cubitus ends in median vein much before the fork of latter. In 

 the hind wings, which are only a little shorter than the fore pair, the 

 radial sector is forked, but the median vein is simple, and all the veins 

 reach the margin. 



Type: M. lactea Wesmael. 

 a Zool. Anz., xxix, p. 226, 1905. 



