NO. 215G. SUBFAMILY ALJilYRODINAE—QVAINTANCE cG BAKlJh'. 351 



ingly over the leaf and in the material at hand are associated with a 

 large number of coccids. 



Adults. — Unknown. 



Described from pupa cases and eggs in balsam moimts and pupa 

 cases dry upon the foUage. 



Ti/pe.— Cat. No. 19101, U.S.N.M. 



ALEUROCANTHUS SPINIFERUS (Qnaintance). 



Plate 38, figs. 1-6. 

 Aleurodes spinifera Quaintance, Can. Ent., vol. 35, 1903, p. 63. 



Egg (fig. 2). — Exclusive of stalk, 0.2 mm. long by about 0.1 

 mm. wide; yellowish, curved, and marked with rather minute, 

 closely set polygonal areas (fig. 3). Stalk quite short, holding egg in 

 more or less upright position on leaf. 



Larva. — Regularly elliptical, appearing brownish on leaf, varying 

 to black, with evident, but short, cottony fringe of wax all around 

 from marginal wax tubes; dorsum without secretion. Size probably 

 in second stage, about 0.4 mm. by 0.3 mm. Margin distinctly crenu- 

 lated aU around; incisions between wax tubes short and acute. 

 Abdominal segments quite distinct, thoracis less so. Dorsum set 

 with very strong, heavy spines as follows: A row on each side about 

 equidistant between the median longitudinal dorsal Hne and margin 

 of case of seven spines each, or 14 in all. Eight of these occur on 

 the abdomen and six on the thorax. More centrally on the thorax 

 are six equally developed spines in pairs. Vasiform orifice, which is 

 somewhat elevated on a subcorneal, truncated protuberance, sub- 

 circular in outhne; operculum subcircular to subcordate, nearly 

 fiUing orifice. Lingula short, nearly obsolete. 



Pupa case (fig. 1). — As seen on leaf, with reflected Ught, jet 

 black, considerably convex, the strong, dark spines plainly evident. 

 Dorsum without secretion, but there is a compact, short, cottony 

 fringe all around from marginal wax tubes. Size about 1.23 mm. 

 long and 0.88 mm. wide; shape oval; dorsum considerably arched 

 and median area prominent, especially at the vasiform orifice, which 

 is situated on a prominent tubercle. On the submarginal area there 

 is an even row of usually 20 spines (fig. 6) averaging 0.22 mm. in 

 length and extending some distance beyond the margin. On the 

 subdorsal area there is a row of similar but shorter spines, usually 

 five pairs on the thorax and six pairs on the abdomen. On the 

 median area there are three paii^ of smaU spines on the thorax, 

 three similar very smaU ones on the anterior part of the abdomen, 

 and a moderately long pair a short cUstance cephalad of the vasi- 

 form orifice. The caudal margin of the case is armed with a pair of 

 hairhke bristles and a pair of setae are situated near the ccphahc 



