DIALEURODICUS PULCHEERIMUS. 31 



DESCRIPTION. 



Egg. — Length about 0.32 mm ; color shiny brown or blackish, with- 

 out markings; stalk short (PI. VI, fig. 1). 



Ptipa case. — Size about 1.7 mm. long by 1.40 mm. wide; case flat, 

 applied closely to leaf, the body segments distinct as transverse 

 ridges; color, under hand lens, shiny dark brown or blackish (PI. VI, 

 fig. 2). 



The specimens in hand show no waxy secretions from dorsum of 

 case nor from the marginal w\'ix tubes. The larvae have a narrow 

 fringe all around the white wax from the marginal wax tubes. Under 

 microscojDe, pupa case brown, the more central portion darker; lighter 

 bands, more evident on the sides, extending transversely across dor- 

 sum, marking tlie segments. 



Case w^ithout the compound wax pores present in Alenrodicus., and 

 the simple wax pores, scattered over dorsum in cockerellii., are, in 

 the present species, absent. There are, however, numerous minute 

 clear points over entire dorsal surface, some occurring singly and 

 others in pairs, one of which is smaller (PL VI, fig. 7). The mar- 

 ginal wax tubes are quite distinct ; the incisions deep and acute, notably 

 more so than in cockerellii. Just within the margin all around is a 

 series of simple wax pores on the marginal wax tubes. (PI. VI, 

 fig. 8.) 



Case ver}^ flat, the lighter specimens showing a coarse network of 

 darker lines on dorsal surface (PI. VI, fig. 2) ; margin without spines 

 or setae. Vasiform orifice cordate, about as broad as long; caudal 

 end terminating in a subcircular orifice or pore; operculum subrec- 

 tangular, the sides rounded and margins straight^ — about twice as 

 wide as long. Lingula not exserted, stout, subspatulate, bearing two 

 pairs of spines. (PI. VI, fig. 6.) On ventral surface, legs, antennae, 

 and rostrum quite distinct; antennae rather short, ending in a finger- 

 like process; rostrum unusually Avell developed, being about 0.18 mm. 

 long; legs short, stout, ending in single hook. (Figs. 3-5.) 



A dvlts. — Unknown. 



Type. — No. 14762, U. S. National Museum. Described from sev- 

 eral pupae in balsam mounts and specimens on foliage. 



Dialeurodicus pulcherrinius n. sp. 

 (PI. VIII, fi-s. 1-8.) 



This species difi'ers from the typical form tn. the genus by having 

 the frons produced acutely and extending beyond the cone of the 

 vertex. The shape of the pupa case is also somewhat diff'erent from 

 that of cockerellii. The general characters, however, seem to ap- 

 proach most nearly to those of Dinlenr odious. 



