524 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvir. 



Cruz Range near Los Gatos, Pacitic Congress Springs, and along 

 Stev^ens Creek, and on the slopes of Sierra Morena Range. Eggs 

 were found in April and Ma}', the early larval stages in April, Ma}^, 

 June, and September and the first week of October, while pupa cases 

 have been plentiful every month of the year on all except the decidu- 

 ous host plants. Adults emerged April 22, 1902, from segregated 

 cases kept in the lal)oratory. 



44. ALEYRODES MASKELLI, new species. 

 Plate XXXVII, tig. 74. 



J^gg. — Size, about 0.27 mm. by o.lo mm., exclusive of the pedicel 

 which is nearly one-half the length of the f^gg.^ and placed at one side 

 of center of the base; the egg is more pointed at the apex and longer 

 and narrower than usual. Color, deep yellow, entire shell covered 

 with pol3'gonal markings. 



Larvx. — All stages are in external appearance essentially the same 

 as in pupa case except that the caudal setffi are much longer. 



Piqxt case. — Size about 0.9 mm. by 0.05 mm., but varying some- 

 what; elliptical in shape, slightl}' narrowed caudad and with posterior 

 end of case truncate. Case closely applied to leaf, at first fiat, but 

 later becoming somewhat convex. The vertical fringe so common in 

 ale3'rodids of this type is a])sent in this species. Dorsum without 

 secretion, but there is a lateral fringe which varies in length and 

 position, in some specimens being long and fiat upon the leaf, in 

 others it is short and so defiexed that it looks like the usual vertical 

 fringe; it is about one-sixth the width of case and made up of very 

 small crystalline coalesced rods, which are distally divided into 

 irregular plates. The case is pale yellow in color, the coloration 

 deepening as the developing insect approaches maturity, empty pupa 

 case colorless; on each side of abdomen, within the body, there is an 

 irregular oblong spot of deep orange-yellow, evidently a visceral 

 gland. A majority of the late pupa cases show a closely striate, wide, 

 marginal rim plainly demarked from dorsum all around ])y a thick 

 line; the lateral wax tubes are not evident, but the crenulations of the 

 marginal rim are rounded points about as long as they are broad at 

 base; the incisions are quite uniform and acute. There is the usual 

 pair of long seta? on the caudo-lateral margin of case, and a pair of 

 short, delicate ones on the cephalo-lateral margin. The dorsum has a 

 number of minte hairs scattered over it; in the marginal rim they are 

 arranged in a row extending around the base; besides these it bears a 

 pair of short seta? arising within the caudal margin of case, and a pair 

 of well-developed spines laterad of the anterior margin of the vasiform 

 orfice. AI)dominal segments distinct on middle one-half of case and 

 somewhat keeled aloup- the dorsi-meson. 



