ALEYllODIDS OF CALI roLWIA — lU'JMIS. 503 



17. ALEYRODES FORBESII Ashmead. 



Alei/roiks forhcsli Asiimkad, Fourteentli Kept. 111. St. Knt. (1884), p. 110 {acerls 

 Forl)es) . 



This is the common, large, box-like species, on leaves of Acer dasy- 

 carj)>n/)^ m many parts of the North — Ithaca, New York; Washing- 

 ton, District of Columt)ia; Url)ana, Illinois. 



18. ALEYRODES FUMIPENNIS Hempel. 



Alcurodes J'n 1)1 Ipennix Hempel, Psyche, VIII, No. 280, p. 394. 



On undetermined grass growing on swampy ground, S. Paulo, 

 Brazil. 



19. ALEYRODES GELATINOSUS ^ Cockerell).^' 



£^gg. — Size, 0.2 In' 0.1 nmi. ; oval, 3'ellow, curved, unmarked, pedicel 

 short, at one side of center of base. 



Larva. — (Stage 1). Size, 0.27 b3'0.1 mm.; subelliptical; wax secre- 

 tion a narrow, white band of coalesced rods closeh" appressed to the 

 margin; color, pale-3'ellow to yellowish-brown; dorsum convex, a))dom- 

 inal sutures distinct along the dorsi-meson; vasiform orilice subcircu- 

 lar; operculum relativel}" the same shape and size, nearly tilling the 

 oritice; lingula not seen. 



Larva. — (Stage 2). Size, 0.5 b}' O.-i mm.; broadly elliptical; wax 

 secretion a continuous dorso-submarginal fringe about width of larva, 

 made up of crystalline rods coalesced nearh^ to distal end, where it is 

 separated into irregular plates; cephalad of the vasiform oritice on each 

 side of the dorsi-meson is a small knob-like portion of flocculent wax. 

 Color, 3^ellow-brown. In other respects as in stage 1. 



Larva. — (Stage 3). Size, 0.6 b}' 0.43 mm.; there is a long caudal 

 pencil of cottony white wax projecting from the median line for some 

 distance; sometimes the caudal pencil is divided into two plume-like 

 parts, the dorsal knobs found in previous stage present, l)ut the fringe 

 is wanting. Color, dark brown; dorsum tinely punctate, bearing a 

 pair of long, tapering, caudo-submarginal spines and a pair of stout, 

 shorter spines, latero-cephalad of the vasiform oi'itice. Vasiform 

 oritice tubercled. In other respects essentially as in previous stages. 



Pa2)a-case. — Size, 0.9 by 0.7 mm.; broadly elliptical, caudal end 

 truncate; secretion in form of a gelatinous ring upon which the case 

 rests and which projects beyond it for a considerable distance. The 

 secretion is a translucent, brownish mass of wax, which under the high 

 power of the conii:)ound microscope shows its rod-like origin. This 

 wax is difticult to remove; when heated it melts, but as soon as cooled 

 it quickly re-forms. It can be dissolved by xylol or in absolute alco- 

 hol, if allowed to remain covered for some time. On some specimens 



"Contrilnitions toward a Moiio<jiai)h of the American Alciuodidiu (U. S. Agri. 

 Dept., Divifiion of Entomology, Technical Ser. 8, p. 27). 



