520 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



41. ALEYRODES VINSONOIDES Cockerell. 

 Aleyrodea rln-'tonoidcs Cockekell, Psyclu', YlII, No. 26H. 

 Fi'ontora, Talmsco, Mexico. On iindetorminod tree. 



42. ALEYRODES QUAINTANCEI, new species. 

 Plate XXXVIl, tigf^. 70-73. 



Eygs. — Type; unmarked, pedicel at one side of base. 



Larva.- — (Stage 1.) Size, 0.33 by 0.2 mm. ; elliptical; wax secretion 

 wanting; color, white; the abdominal segments distinct to margin; 

 neither marginal rim nor lateral wax tubes evident, but short lateral 

 hairs set in conical bases extend around the entire margin; the usual 

 caudal and latero-caudal hairs are very long, the former set in con- 

 spicuousl}" large conical bases. Vasiform orifices broadly oAate, 

 truncate at caudal end, lateral margins straight; operculum less than 

 one-half length of orifice, rectanguiiir, sc^uarely notched at the latero- 

 cephalic angles and with a minute spine mesad of the notch; lingula 

 about two- thirds length of orifice, spatulate covered with transparent 

 dots, which are probably minute hairs; apex setose, the hairs much 

 longer than usual. Within the body two large dark-yellow visceral 

 glands are conspicuous. Eye-spots large, dark red. 



Larva. — (Stage 2, studied from molt.) Size, 0.3.5 by 0.20 mm.; 

 shape broadly elliptical; wax secretion wanting. Color, a semitrans- 

 parent whitish yellow. There is no marginal rim and the lateral wax 

 tubes are evident; crenulations large, rather pointed, reentrant angle 

 acute; abdominal sutures barely visible. No lateral hairs, but the 

 dorsum bears three pairs of long and tapering spines — a pair on the 

 cephalic region, a pair on thorax, and a pair latero-cephaled of the 

 vasiform orifice; the latter are shorter and more delicate than the 

 others; the usual caudal and latero-caudal hairs are present. Vasiform 

 orifice as in pupa case. No traces of legs, antenna^, or ej^e-spots. 



Larva. — Stage 3 (studied from moults). Size, O.-Jri by 0.2 nmi., 

 broadly elliptical, truncate at the caudal end; color, brown; by trans- 

 mitted light, a pale smoky shade; there are transverse bands of darker 

 color on each of the abdominal segments, which are also covered with 

 transparent dashes. Bod}" segments distinct. The marginal rim is 

 wanting, but the lateral wax tubes are slightly bent downward. 

 Crenulations of margin, vasiform orifice, and lateral fringe as in pupa- 

 case. Dorsal spines as in 3'ounger stage, but much reduced. 



EarJ[i pupa-case. — Size, about 0.56 by 0.15 mm., measured within 

 marginal rim; shape subovoid, prolonged caudad, extreme caudal end 

 lobe-like; on each side of this part of case there is a short blunt spine. 

 Color black, case highl}" chitinized, crenulations of rim as in pupa- 

 case. 



