60 CLASSIFICATION OF THE ALEYRODID^. 



dominal region, and two pairs of smaller pores on anal seg^nents; 

 on caudal end of case there are two pairs of scalelike markings on 

 the thorax, and a pair of simple pores near cephalic margin. Ab- 

 dominal segments distinct. 



From within the margin of case all aronnd arises a series of slender 

 spines, or seta^, about 12 on each side. There is a pair of minute 

 setae just cephalad of the vasiform orifice, and two pairs of setae are 

 present on the thoracic region. 



Vasiform orifice (PI. XVI, fig. 3) subcordate to subcircular, little 

 longer than wide. Operculum subrectangular, concave on distal 

 margin, almost twice as wide as long. Lingula as usual, spatulate, 

 with two pairs of spines on distal end. Operculum and lingula 

 minutely spinose. On ventral surface of case the legs are quite 

 evident, terminating in a single, hooked claw. Antennas as usual, 

 two-jointed, the distal joint numerously ringed. 



Adult female. — Length 1.9 to 2 mm. Forewing, length 2.60 mm., 

 width 1.23 mm. Body and wings dusted with white wax, and there 

 is a copious waxy secretion from ventral surface of abdomen of both 

 sexes. Greneral color of head and thorax dark brown to blackish, 

 abdomen bright red; legs, margins of wings, wing veins, and an- 

 tennae reddish. 



Eyes plumbeous, constricted, the smaller division below. Fore- 

 wing (Pi. XVI, fig. 6) marked across the middle with a conspicuous, 

 broad brownish band. This arises from the cephalic margin of the 

 wing and extends caudad usually beyond the media well toward the 

 caudal margin of wing. Hind wing without markings. 



Antennae as usual (PI. XVI, fig. 8). Tibia of hind leg 0.8 mm. 

 long; first tarsal joint 0.26 mm., second tarsal joint 0.13 mm. in 

 length. 



Adult male. — Length 1.3 mm.; valves of anal forceps 0.7 mm. long, 

 curved, inserted in the cylindrical anal segment (PI. XVI, figs. 10, 

 11). Forewing 2.1 mm. long by 0.95 mm. wide, marked as described 

 for female. Hind wing unmarked. General color duslty to blackish, 

 more or less covered with white waxy powder. 



Type. — No. 14768, U. S. National Museum. Described from numer- 

 ous eggs, pupae, and adults of both sexes. Dedicated to Mr. P. L. 

 Guppy. 



Aleurodicus jamaicensis Cockerell. 



(PI. XIX, figs. 1-5.) 



Aleurodicus jamaicensis Cockerell, Proc. Acad. Nat. Sci., Phlla., vol. 54, 

 p. 280 (1902). 



The type of this species consists of a single parasitized pupa case 

 in a balsam slide mount. From this scant material and the imperfect 

 original description we are quite unable to obtain an adequate con- 



