THE CANADIAN ENTOMOLOGIST. 



Subfamily Lecaniinie. 

 Lecanium Silveirai, n sp. 



$ sub-circular to oval in outline, light red in colour. Dorsum con- 

 vex, shiny, with a slight longitudinal median ridge ; derm hard, 

 depressed around the anal plates, and covered with a very thin layer of 

 waxy secretion. Anal cleft short, with the sides contiguous. Arising on 

 the ventral surface and extending up each side, are two lines of white 

 powdery secretion. When removed from its resting place, it leaves a 

 round patch of thin white wax behind. The specimens examined were 

 5 mm. long, 3.5 mm. wide, and 2 mm. high. It is probable that these 

 specimens were immature, as none contained eggs or larv;e. 



Boiled in a solution of KOH, the derm becomes soft and transpa- 

 rent, being chitinized only around the anal plates. Antennae and legs 

 wanting. Rostrum large and well developed, situated between the first 

 pair of spiracles. Rostral loop long, extending to the anal plates. Anal 

 ring apparently with ten hairs. Anal plates small, with the lateral angle 

 rounded, and the antero-lateral side longer than the postero-lateral. The 

 margin has two horseshoe-shaped incisions on each side, opposite the 

 spiracles, in which the derm is thickened and chitinized. The spiracles 

 are situated very near to these incisions, and are connected with them by 

 many small round spinnerets. The tracheae are large and many- 

 branched. Around the margin of the body there are 2 or 3 rows of small 

 liairs, each one arising from a small tubercle. The entire derm on both 

 surfaces is covered with numerous laige, round, nipple-shaped glands. 

 These are dark brown with a light centre. Interspersed among these 

 glands are a few hairs, and numerous small slender filamentous glands. 



Hab. — Sete Lagoas and Diamantina, State of Minas Geraes. On the 

 roots of grapevines, where it causes much damage. The specimens 

 were collected by Mr. Alvaro da Silveira, on the roots of the Isabel 

 grape. Mr. Amandio vSobral and Dr. Compas da Paz have known a 

 disease for several years which they attribute to this insect. This species 

 is of special interest to agriculturists and economic entomologists; and 

 will be difficult to combat, because of its subterraneous habits. 

 Lecanium obscurum, n. sp. 



9 scale of young and halfgrown individuals, green ; the scale 

 becomes darker with age, and is black in the old specimens. Shape 

 elliptical, dorsum convex rounded, shiny, with minute patches of waxy 

 secretion j the derm is finely granular, and wrinkled at the sides. On the 



