526 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



of some specimens, but more usually found upon the cephalic and 

 thoracic regions, are a number of large yellow semitransparent 

 spaces; besides these there are a variable number of small pores, 

 arranged in nearly parallel longitudinal lines or groups. The num- 

 ber of these pores is considerably increased when the case is slightly 

 cleared in caustic potash. The median thoraco-cephalic suture and 

 the thoraco-abdominal suture are conspicuous because of their color 

 and semitransparenc}'; the latter of these sutures is sinuate and ex- 

 tends to the lateral margins of the case. There is a dorsi-median 

 longitudinal keel extending length of abdomen; upon this the sutures 

 are distinct; the last three are strongh' reliexed caudad. Within the 

 marginal rim is a row of large conical papilhv, from which issues the 

 dorso-submarginal waxen rods; mesad of the papillis are several irregu- 

 lar rows of minute blunt spines. The marginal crenulations are shal- 

 low and irregular and the wax tubes indefinite in outline. 



Vasiform orifice subovate, about four-fifths as wide as long, the inner 

 lateral and caudal margins much cori'ugated, giving the impression of 

 being toothed, and the folds darker in color than the surrounding sur- 

 face. Operculum liroadh^ ovate, scared}' one-half length of orifice and 

 not as wide, the cephalic margin straight, dorsum convex and covered 

 with minute hairs. Lingula about three-fourths length of orifice, 

 cylindrical to enlarged distal portion, which has three pairs of lateral 

 lobes and a terminal lobe; arising from the apex laterad of the ter- 

 minal lobe is a pair of long .stout seta? which project caudad; the 

 enlarged portion is denselv and minutely setose. From the apex of 

 the vasiform orifice to the caudal margin there extends a distinct fur- 

 row. The margin of the pupa case bears a pair of delicate latero- 

 caudal hairs; the usual caudal pair are wanting. 



This Aleyrodid is found on the under sides of the leaves of Rhamnus 

 calif arnica^ together with ^4. iridescens and A. splendens. The species 

 is not plentiful; usually not more than a single specimen is found on a 

 leaf. Only the pupal stage has been verified. 



Cotypes.—^o. 7100, U.S.N.M. 



Collected hy the author in April and May, 1902, on the campus, 

 Leland Stanford Junior University, and at Stevens Creek November 

 12, 1901. 



46. ALEYRODES EXTRANIENS, new species. 

 Plate XXXVI, figs. 65-67. 



Egg. — Size, 0.2 mm. by O.OS mm. Unmarked, deep 3^ellow; apex 

 pointed, pedicel to one side of base. Shell thick and so firm that it 

 retains its shape when empty. 



Larva. — (Stage 1.) Size about O.-l mm. bv 0.25 mm.; shape, ellip- 

 tical; color, pale yellow; dorsum, convex. There is neither dorsal nor 

 lateral exudation of wax, but most of the specimens show a slight 



