38 
suggested that this is perhaps not a true Hriococcus, but I must agree 
with Mr. Maskell in placing such forms as this in that genus. 
Lecanium imbricatum n. sp. 
Female (on twig) about 4 mm. long, oval, moderately convex, much 
wrinkled, no doubt from contraction in drying, therefore probably 
soft when alive. Reddish brown, moderately shiny, more or less cov- 
ered, especially at sides, with a thin, fragile coat of glassy secretion. 
Derm thickly beset with large brown glands, which, viewed laterally, 
are broadly fusiform. Anogenital ring with eight long hairs, about as 
long as the anal plates. Anal plates yellowish brown, longer than 
broad, with the outer sides nearly equal and meeting at about a right 
angle. Antenne very short but thick, rudimentary, joints not distin- 
guishable; tip with several hairs. Legs rudimentary, very short and 
stout; the femur might almost be described as oval. : 
Male.—Seale as usual in genus, white, glassy, rugose; very numerous 
on twig, overlapping one another like tiles on a house or the involu- 
eral bracts of a composite plant. 
Habitat.—Alta Mira, Tamaulipas, Mexico, on Mimosa, October 15, 
1894. (Townsend; Div. Ent. Dept. Agr. No. 6440.) 
A very interesting species, of a neotropical type, characterized by a 
nonreticulate derm with large glands, antenne and legs often rudi- 
mentary or wanting, surface more or less covered with waxy or glassy 
secretion. The curious South American forms of Lecanium, mostly 
appertaining to this type but very diverse among themselves, have 
remained practically unknown; at the present time several new species, 
brought to light by Dr. von Ihering, can only be regarded as a small 
portion of those which doubtless exist. 
The nearest ally of L. imbricatun certainly appears to be L. wrichi 
Ckll., discovered in Trinidad, but lately received also from Brazil. 
The Brazilian examples are on Smilax campestris Griseb., Rio Grande 
do Sul (Dr. von Ihering); they seem certainly to belong to wrichi, but 
whereas in the types of that species I found no antenne, on examining 
a Brazilian example I find short, pale antenne of about seven joints. 
Orthezia sonorensis n. sp. 
Female.—Length 24 mm., with ovisac 11 mm.; breadth of sac 54 mmm. 
Dorsum covered by the white secretion, except a small area posteriorly. 
Four strong lamin on each side projecting backward over base of 
ovisac; median lamina (or pair) very much abbreviated. Derm trans- 
parent, thickly beset with small spines. Legs orange brown, coxa 
broader than long, femur abeut as long as tibia, tarsus hardly more 
than half as long as tibia; claw stout, not much curved; claw and distal 
half of tarsus dark brown. Tibia and tarsus with numerous short stout 
spines on inner side. [Antenne broken in the adults examined.| ln- 
mature form with 7-jointed antenne; formula 7, 3 (1, 2, 4) 5, 6; 5 very 
nearly as long as 4, 7 very slender. Earlier stage with 6-jointed antenne ; 
