16 HEMIPTERA-HOMOPTERA. 
being divided longitudinally. Each portion of the glassy scale has a low eminence, from which lines 
radiate and round which concentric strie run. Removed from the twig, the insect leaves a white mark. 
Skin after boiling irregularly mottled with brown, translucent. Anal plates in a rounded opening, the 
margins of which are brown (chitinous) and thickened. Median line with a longitudinal band of minute 
gland-dots. Anal ring with six bristles. Marginal spines simple, fairly large, numerous, distance from 
one to the next varying from 33 to 115 p. 
Larva with well-developed legs; coxa 34, femora with trochanter 64-98 p, tibia 56-70 p, tarsus 59 p, 
claw 12 p. 
d. Dark reddish-brown ; wings dull hyaline, like ground glass, with a well-defined reddish costal nervure. 
Length of wing 961; breadth 497 4. Genital spike long, 282 p. 
3. Scale about 13 millim. long, glassy, roughened, with no defined dorsal area nor white sutures, but a distinct 
glassy cap placed dorsally at the hinder end. 
Hab. Mexico: Vera Cruz (city), April 28, 1898, on Mimosa with big thorns which 
are inhabited by stinging ants (Pseudomyrma, sp.) (Townsend). 
It is to be remarked that there are two types of male scale among the Lecaniine— 
that of Lecanium and that of Schizochlamidia, Lecanochiton, and Ctenochiton. In the 
first there is a well-defined dorsal area, from which radiate transverse sutures, and 
there is no cap at the hinder end; in the second there is a cap, and the dorsal area is 
lacking. This difference, combined with certain peculiarities of the female, might be 
held to indicate two tribes, to be called Lecaniini and Ctenochitonini. The following 
notes will assist in the further elucidation of this matter :— 
CTENOCHITONINI. 
Cryptes, having the cap, will fall in this. series, though the ¢ scale is peculiar. 
Ceroplastodes dale, Ckll.: ¢ scale glassy, strongly tuberculate all over; the glassy cap exists, but is tuberculate 
like the rest of the surface, and its suture is hardly discernible. 
Ceroplastodes niveus, Ckll.: 3 scale also very rough, but the cap is very distinct, and has on it two whitish lines 
forming a narrow V; these are also more or less discernible in C. dalee. 
L&ECANIINI. 
Pulvinaria paradelpha, Ckll. & Lidgett, has a Lecanium-like scale, but with more sutures.. 
Lichtensia lutea (Ckll.): ¢ scale glassy, transparent, Lecantwm-like, but the dorsal area convex, and only one 
pair of lateral sutures, those on the posterior half. 
Lecanium strachan, Ckll.: ¢ scale has the dorsal area so narrow as to be practically a single ridge, the trans- 
verse sutures obliterated, and a vaguely indicated small cap. Thus both in the male and female this 
peculiar species tends towards the Otenochitonini. (For the 9, see Entom. xxxi. p- 259.) 
VINSONIA, Sign. 
1. Vinsonia stellifera. 
Vinsonia stellifera (Westwood), Douglas, Ent. Monthly Mag., Dec. 1888, p. 152.. 
Hab. CentRaL AMERICA. 
Mr. Alex. Craw found this on an orchid from Central America, locality unknown. 
