90 THE CANADIAN ENTOMOLOGIST. 



short spines, thicker and longer on distal end, where it terminates in two 

 small lobes. From the ventral surface of distal end of lingula arises a 

 pair of upward curving setse, extending caudad almost to caudal margin 

 of vasiform orifice. On ventral surface, rudimentary feet distinct. 



Adult ^. — About .8 mm. long to tip of genitalia; length of front 

 wing .8 mm.; length of antennje about .516 mm. ; length of hind tibia 

 .3 mm.; length of hind tarsus and claw .166 mm. Body uniformly 

 greenish-yellow ; wings immaculate ; eyes reddish, distinctly divided, 

 larger part ventrad. Antennas of seven joints. Joint i, short, obovate, 

 one-half length of second ; joint 2, somewhat club-shaped, and obliquely 

 truncate distally ; joint 3, long, cylindrical, slightly longer than i and 2 

 together ; joints 4, 5 and 6 together, about equal in length to joint 3 ; 

 joints 5 and 6, subequal in length, and one-third thicker than joint 4 ; 

 joint 7, very long and tapering, being about equal in length to joints 3, 4, 

 5 and 6 together ; joints 3, 4, 5 and 6 are rather coarsely ringed, joint 7 

 minutely spined. 



On third pair legs, femur about two-thirds length of tibia ; tarsi 

 five-ninths length of tibia. Mentum much reduced, about as long as 

 middle tarsi, excluding claw, slender at base, enlarged distally, and 

 tipped with dusky. Operculum, in dorsal aspect, sub-rectangular in out- 

 line, somewhat concave on caudal margin, which is minutely setate. 

 Lingula cylindrical, and truncate distally, but spreading at base, extending 

 caudad beyond margin of operculum, somewhat more than length of 

 operculum. On the truncated end is a group of setae. 



Penis slender, tapering, curved upwards, about two-thirds length of 

 valves ; valves rather short, stout, clasping at tip. On last segment of 

 abdomen at base of each valve is a short fleshy protuberance. Wings 

 delicately beaded all around ; median vein of fore wing extending nearly 

 to tip of wing ; basal veinlet apparently arising free from median vein, 

 extending obliquely to caudal margin. 



Adult ? . — Unknown. 



Collected on an undetermined grass, July 24, 1898, at Lake City, 

 Florida, by Prof. P. H. Rolfs. 

 Aleurodes Rol/sii, n. sp. 



Pupa-case. — Length, .72 mm. : width, .45 mm. ; varying somewhat ; 

 regularly elliptical in shape, raised on vertical fringe of white, waxen rods. 

 Colour, clear whitish, with more or less of brownish frequently along 

 dorsi-meson ; the inclosed pupa is yellowish, with eyes reddish. Margin 



