436 Mr. T. D. A. Cockerell on 



gradually widening to a sort of trumpet-like extremity ; 

 tarsal digi tales only moderately long, not twice length of 

 claw. 



Hah. Frontera, Tabasca, Mexico, June 26, 1897, on 

 *' Guanabano " (doubtless (7resce«<m), a cultivated tree with 

 gourd-like fruit {Townsend). Div. Ent. 7980. 



Lecanium [Saissetia) castilloce, sp. n. 



$ . — Scale 8 millim. long, 7 wide, flat, with an irregular 

 broad-oval outline, dull ; black, with a minute peppering of 

 whitish patches of secretion, most abundant towards the sides, 

 where they give the scale a greyish tint. The sides of the 

 scale are perpendicular, about 1 millim, high, the edge of the 

 dorsal portion slightly overlapping at the top, like the roof of 

 a house. Posterior cleft about 2^ millim. long. 



Skin extremely thick, resisting prolonged boiling in caustic 

 potash ; by transmitted light dark vandyke-brown, tessellated 

 as in Saissttia, each small polygon with a central hyaline 

 spot. Legs pale yellowish, small, slender; coxa and tro- 

 chanter each with a subapical bristle ; tibia very slender, not 

 quite so long as femur ; tarsus about f length of tibia ; claw 

 moderate, curved ; claw-digitules stout but long, extending 

 considerably beyond claw, well knobbed. 



Hab. Frontera, Tabasco, Mexico, June 25, 1897, on bark 

 of trunk of CastiUoa elastt'ca, also on "Moral" {Townsend). 

 Div. Ent. 7981. 



A remarkable species, quite distinct in outward form from 

 all described. 



Lecanium {Pseudokermes) armatunif sp. n. 



$ . — Scale 4^ millim. long, 4^ wide, 3 high, hemispherical, 

 greenish yellow to yellowish brown, with a very thin and 

 easily deciduous glassy coating, present only in fragments 

 in the specimens seen. Anal area depressed and darkened. 

 The scale is divided into convex plates or areas, two very 

 large ones subdorsally and seven laterally, on each side ; each 

 of these convex areas presents in the middle a small conical 

 prominence. Margin thickened. 



2 . — Boiled in liquor potassfe gives a dark brown colour. 

 Skin chitinous, with rather large and numerous round glands; 

 towards the margins the skin is obscurely reticulated, in 

 Eulecanium fashion. The dermis exhibits numerous large 

 low-conical elevations. Legs and antenna? apparently absent. 



^ . — Scales small, overlapping, with a glassy covering as 

 usual in Lecanium. 



