344 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull, 



marginal area and disk of dorsum, the longest being as long as 

 half the width of the body and are arranged as follows : two pairs 

 near cephalic margin, one pair each on prothoracic and meta- 

 thoracic regions, one pair near margin at base of mesothoracic 

 region, two pairs near margin at base of abdomen, one pair on 

 disk of each, the third, fourth, fifth and sixth abdominal segments, 

 one pair near apex of vasiform orifice. Vasiform orifice subtri- 

 angular, with angles rounded and sides bulging, about seven- 

 eighths as broad as long ; operculum nearly semicircular or slightly 

 reniform, two-thirds as long as broad, reaching half the length of 

 orifice ; lingula spatulate, apex seven-lobed, papillose for its entire 

 length, the terminal lobe spiny and projecting between two longer 

 spines which are about io/x in length. 



Adult female about .86 mm. long, fore wing about I. x .45 mm., 

 white, immaculate, semitransparent ; body yellow, legs and 

 antennae white. Eyes reddish, apparently, but not really divided. 

 Granular wax secretion very scanty and does not have the mealy 

 appearance common to most species. Male smaller than female 

 but differs only in sexual characters. 



Hosts : Black walnut, Jitglans nigra, and butternut, /. cinerea. 

 New Haven, 22 July, 1904 (B. H. W.) ; Mount Carmel, 24 Sept., 1904, 

 New Canaan, 15 Sept., 1905 (W. E. B.). 



Aleyrodes Latreille. 



Pupa case, medium size or less, elliptic, brownish or yellowish, 

 margin crenulate, wax tubes irregular and poorly developed ; sub- 

 marginal area not differentiated from dorsal disk; without well 

 developed papillae, or evident tracheal folds ; wax secretion usually 

 absent. Vasiform orifice subcordate, operculum about half filling 

 the orifice ; lingula extended beyond the operculum but not beyond 

 apex of the orifice, the distal end usually setose, and bearing a pair 

 of spines. 



Adult, fore wing with two flexures in radial sector, media only 

 a short spur, usually clouded on distal half. Antennae of seven 

 imbricated segments, the third being longest and the distal ones 

 subequal. 



Key to Species. 



1. Pupa case with segmented disk highly convex and dark brown in 



color. Adults white or yellowish, fore wings marked with a two- 

 lobed dusky spot asarumis 



2. Pupa case with disk nearly flat, uniform pale greenish white. 



Adults white or pale yellow, wings immaculate fernaldi 



A. asarumis Shimer. actcae Britton. (PL xii, 4.) 

 Trans. Am. Ent. Soc, i, 281, 1867 ; Ent. News, xvi, 65, 1905. 

 Pupa case about 1.5x1. mm., broadly oval, pale yellow or 

 greenish white near the margin, with the dorsal disk dark brown, 

 highly convex, and most abrupt at cephalic extremity. Segmenta- 

 tion prominent, each segment having a median crest darker than 

 the surrounding area. Marginal area radially corrugated or 



