NO. 1362. ALFA'RODIDS OF CALIFORXIA—BEMIS. 515 



removed from leaf there is left a narrow, white, vertical fringe; the 

 outer part of ca.se is transparent white, central region brown, laterally 

 shadini;' to yellow; this contrast in coloration renders the case very 

 conspicuous; on the cephalic region the color is projected cephalad in 

 two i)rong-shaped markings; near the anterior end of the dark space 

 there is a pair of small pores, one each side of the dorsi-meson; on 

 each segment of the case there are a number of small pores, usual I3' 

 arranged in a group at each end, with a transverse row between the 

 groups; all of these pores lie within the space covered l)y the dark color; 

 there are also many small pores outside this color limit, but the case 

 is so transparent that the}^ are nearly invisible. The dorsum is con\ex 

 and has no marginal rmi, crenulations of the margin itself are irregular, 

 broadly rounded, and shallow, reentrant angles acute; abdonuMi keeled 

 on dorsi-meson, the segments distinct along the keel; the thoraco- 

 abdominal suture and the dorso-medial suture, which meets it at right 

 angles, are also evident; cephalad of the vasiform oritice are two 

 conspicuously chitinized, crescent-shaped thickenings in the tergum. 

 Vasiform oritice subovate, caudal end broadly rounded, bounded by a 

 slightly raised rim, deeper yellow than surrounding dorsum, the inner 

 lateral and caudal margins of the orifice nmch corrugated or folded; 

 operculum not one-half the length of oritice, and in width not quite 

 tilling the open space, distal, free end truncate; dorsum seto.se; lingula 

 well developed, nearl}^ or quite as long as the oritice, spatulate, distal 

 portion convex, enlarged, rather bulbous, apex with a pair of long 

 and caudall}' projecting hairs at its lateral angles, the portion which 

 projects beyond the operculum setose. Latero-cephalad of oritice is a 

 pair of short, delicate setfe. 



Adults. — As in ^4. j}rui?iosi/s. 



Cotypes.—No. 7094, U.S.N.M. 



This species is found only on the willow and is peculiar to it; a great 

 number of specimens were collected on Novendjer -1, 1901, from Sa/i.v 

 laevigata at Stevens Creek, Santa Clara Valley; the immature stages 

 were on the under sides of the leaves, which were frequently encrusted 

 with them. Adults were Issuing from the pupa-cases, and many had 

 settled upon the under sides of leaves of WasJihujtonia iiuda., which was 

 growing under the host plants. The coloration of the pupa-tases i.«< 

 rather characteristic of parasitized cases in general; but as adults were 

 seen issuing in numbers from the cases which were darkest, the 

 coloration must t»e normal. 



34. ALEYRODES ROLFSII Quaintance. 

 Alct/nKlrs rol/sii (ir.\iXT.\NCE, Can. Ent., XXXI, ]>. tK). 



From Upola, Florida, on cultivated geranium. 



