THE CANADIAN ENTOMOLOGIST. 209 



visible after detaching the scale. Younger specimens are flatter, long. 6, 

 lat. 4, alt. 2 mm. There is no waxy secretion on the surface. 



$ . — -Boiled in soda stains the liquid dark Vandyke-brown. No legs 

 or antennae found ; probably they are rudimentary and easily deciduous. 

 Anal plates small, pinkish-brown, together forming about a square. Derm 

 pale reddish-brown after boiling, not reticulated, remarkable for an 

 immense number of minute gland orifices, among which are intersi)ersed 

 a lesser number of larger, but still small, glands, which are circular and 

 brown in colour. There are also large brownish patches. In places tiie 

 tubular ducts of the minute glands are darkened, giving the derm a bristly 

 appearance. The derm may be compared to the sky seen through a tele- 

 scope, the minute glands being the fixed stars, the larger the planets, and 

 the patches the nebula, though of course the sky does not exhibit so many 

 planets or nebuloe. 



Embryonic larva (after boiling) very pale pink, with very well- 

 developed, stout, cylindrical caudal tubercles, which are the forerunners 

 of the anal plates ; each emits the usual long bristle, but these are easily 

 broken off. Tarsus hardly or not over ji length of tibia, femur and tibia 

 approximately of equal length. Digitules all filiform, the tarsal ones very 

 long, twice as long as those of claw, and longer than the tarsus itself. 

 Rostral loop extending considerably beyond the hindmost legs. Anal 

 ring with apparently only six bristles. Last joint of antennae long. 



Hab. — On Cliilaspis linearis, Tehuantepec City, Mexico, May 26th, 

 1896. (Townsend : Div. Ent., No. 7216.) On the Chilaspis at the same 

 time and place were also taken species of Aspidiotus and Mytilaspis, but 

 the material is inadequate for proper study. Z. chilaspidis is a very 

 distinct species, but more nearly allied to other neotropical forms than to 

 anything else. 



(7.) Lecaniodiaspis ( Prosopophora) radiattis, n. sp. — '^ , Long. 3, 

 lat. 2 mm., often rounder, to long. 2^/3, lat. 2}^ mm., more or less shiny, 

 flattish, pale ochreous, with a longitudinal median keel, low but distinct, 

 and well-defined radiating ribs, marking the segments. Removed from 

 the bark, the scale leaves a whitish mark. Boiled in soda, it turns the 

 liquid greenish. Antennae pale brownish, apparently 8-jointed, but the 

 joints obscure ; 8 short, butlonlike ; 3 longest, then 4, or these two 

 about equal ; 2 broader than long ; 5 and 6 might be taken for one long 

 joint, fully as long as 3 ; 7 very little smaller than 6. Dermis with numer- 

 ous very small figure-of-8 glands, which under a low power look like 



