37 



DESCRIPTION OF A NEW SPECIES OF LECANIUM FROM 



BOHEMIA. 

 BY KAREL SULC. 



Lecanium DoUGLASr. 



? adult. Scale large, high, almost circular, sometimes highest anteriorly ; 

 dorsum smooth, on the periphery distinctly dimpled, yellowish-brown, with narrow 



piceous stripes ; one stripe median, the 

 others, about ten in number, radial, cor- 

 responding with segments of the body. 

 The insect itself piceous. Scales full of 

 eggs, Kermes-like, covered with spots of 

 glass-like matter, so as to appear to be 

 powdered, which matter arises from 

 strainer-like, circular, glandular openings 

 (fig. 1). Antennae stout, long, 8-jointed 

 (fig. 2), the 1st joint large, massive; the 

 2nd narrower than the 1st, and a little 

 shorter ; 3rd longest, as long as the Ist 

 and 2nd together ; 4th a little longer than 

 the 2nd, in length equal to the 8th ; 5th, 

 6th, and 7th in length equal, shortest ; 

 two hairs on the Ist ; two on the 2nd, one 

 of which is strong, and reaches to the base 

 of the 5th joint ; none on the 3rd and 

 4th ; three on the 5th, one of which sur- 



. . , -. ^ passes the 7th ; one on 6th and 7th ; and 



rt^ ' ' Im/ I \ /I about ten on the 8th. Legs (fig. 3) very 



^ ^\ y* I I '* I long, not stout in proportion to the body ; 



coxa with three, trochanter with two hairs ; 

 femur and tibia in length equal each at 

 distal end with one or two hairs ; tarsus 

 monomerous, little longer than tibia, with 

 four distal hairs; claw strong, with a small 

 tooth ; digitules of the tarsus and claw 

 long, filiform, dilated at the extremity. 

 Stigmata in two pairs, one pair on meso- 

 and one on metathorax, with a few glandu- 

 lar openings ; some are also placed on the limit of meso- and metathorax. They 

 are circular, with six equal pores ; one of which is in the middle, and five on the 

 periphery (fig. 4) ; whereas on the ventral segments in similar glandular openings, the 

 central pore is large, and the pores on the periphery are ten in number, and five- 

 aiigulated (fig. 5). Margin with equidistant, conical, spine-shaped, glandular ducts. 

 Anal cleft deep ; anal ring with six long hairs ; anal scales triangular, with four short 

 spines. Length 7 mm. ; breadth, 6 mm. ; height, 5 mm. 



Newly-hatched larva. — Yellowish, ob.ong, rounded anteriorly, narrower pos- 



