518 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvn. 



39- 



ALEYRODES VAPORARIORUM Westwood. 



Aleyrodes vcq>orarwruin ^yEST^\ooT>, Gard. Chron., 1856, p. 852. — Sigxoret, Ann. 

 de la Soc. Ent. de France, Dec, 1867, p. 387.— AY. E. Britton, Ninth Ann. 

 Kept. Conn. Agr. Expt. Sta., 1895, Pt. 2, p. 208. 



40. ALEYRODES GLACIALIS, new species. 

 Plate XXXI, figs. 31-;-!3. 



Zarvrp. — The dorsum lacks the curved mesal wax lilaments which are 

 found on the pupa case; in other external respects as in the pupa case. 



PujM-case. — Size, 0.85 mm. by 0.6 mm.; elliptical; color, with 

 inclosed pupa, yellow; when the case is empty, semitransparent white; 

 occasionally the color ma}^ vary from yellowish-))rown to a more or 

 less mottled brown, or, in extreme cases, to an almost uniform brown- 

 ish-black; this color variation is due to parasitization or to the 

 presence of fungus. There is no lateral fringe, but just inside the 

 dorso-lateral margin there is a continuous submarginal fringe, made 

 up of an irregular series of tapering crystalline rods of about equal 

 length and more than one-half the width of case. These issue from 

 large conical papillae, which are arranged around the case in a row of 

 from one to three deep, except caudad and latero-caudad of the vasi- 

 form orilice, where there are an irregular numVjer. Mesad of the sub- 

 marginal fringe there are a variable number of shorter tapering rods 

 of wax, which are curved or even coiled upon themselves; these are 

 arranged with reference to the segments and issue from large circular 

 pores, which constitute the most conspicuous dorsal character of this 

 species and which may var}" from one on each side of the segment to 

 groups of from three to live. Besides these pores there are others, so 

 scattered that no definite place can be assigned them, and also many 

 small pores scattered among the papillas and over the dorsum. Dor- 

 sum convex, finely punctate, and with a pair of long tapering caudo- 

 marginal spines set in conspicuous conical bases, and a pair of very 

 long spines laterad of the anterior margin of the vasiform orifice; the 

 usual caudal pair are wanting; the latero-caudal pair are short and the 

 cephalo-marginal pair are minute. Crenulations of margin of case 

 broad and very shallow; where the caudal furrow meets the margin 

 the crenulations are distinctly difierent, being deeper and more pointed 

 in outline and closer together (Plate XXXI, fig. 33). Abdominal 

 sutures faintl}^ defined, the posterior ones strongly reflexed caudad; in 

 the abdomen two large yellow visceral glands show through the bod}^ 

 wall. Vasiform orifice broadly ovate, almost as broad as long; cephalic 

 edge straight, caudal end with a fine acute emargination with a small 

 finger-like process. Operculum subsemielliptical, much broader than 

 long, and less than one-half the length of orifice. Lingula nearly 

 the length of orifice, subspatualate, densely setose with minute hairs, 

 and bearing three pairs of lateral lobes and a terminal lobe. Cephalad 



