AET. Ii2. MASKELL GENERA OF COCCIDAE MORRISON. 85 



two, opposite each spiracle, placed in the midst of a group of disk 

 pores; dorsal derm with an occasional small stiff seta, these much 

 more numerous and larger in the area around the anal plates, ventral 

 derm with an occasional large stiff seta anteriorly, and a number of 

 the same in transverse rows, one to each abdominal segment, pos- 

 teriorly; anal plates stout triangular, the anterio-lateral margin 

 longer than the posterio-lateral, the apices rounded, bearing three or 

 four subapical and apical setae dorsally, and about five to seven 

 larger ventral setae, mostly subapical, but probably continuous with 

 a row of fringe setae which was not observable in the Maskell mount 

 on account of its condition ; no hypopygial setae noted ; anal ring 

 relatively large, not very heavy, with a double row of pores and 

 numerous (perhaps as many as 24) rather long, stout setae. 



Immature stages. — None available for examination. 



The following generic diagnosis has been based wholly on the 

 preceding description. 



GENERIC DIAGNOSIS OF ALECANOPSIS. 



Coccine forms of the Fernald catalogue, having a subterranean 

 habit; adult female strongly convex, wrinkled, derm not heavily 

 chitinized, antennae reduced, 6-segmented, legs much reduced, joints 

 indistinct, mentum very short, 1-segmented, spiracles considerably 

 larger than normal, and more heavily chitinized, derm pores includ- 

 ing tubular ducts of two distinct sizes, somewhat variable multiloc- 

 ular disk pores, those opposite spiracles with five loculi, those ante- 

 rior to anal plates with seven, and dorsally with obscurely trilocular 

 disk pores anterior to anal plates, all derm setae slender, but stiff, the 

 marginal scattered, entire, not in continuous row, the spiracular 

 spines stout, clavate, one or two opposite each spiracle, dorsal setae 

 snjall, ventral larger, but still small, anal plates broad triangular, 

 with a few dorsal apical and subapical setae, a number of larger ven- 

 tral ridge setae, and some large fringe setae, anal ring rather slender, 

 with pores and very numerous (over 20) setae. 



The writers have no specimens of Lecanopsis available for exami- 

 nation, and are therefore unable to make a critical comparison of it 

 with Alecanopsis. Professor Cockerell established the genus in 1901 

 on the very superficial characters of the shape of the body, the color, 

 and the reduction of the legs and antennae. This reduction, in con- 

 nection with the enlargement of the spiracles, the habit and the great 

 increase in the number of anal ring setae are probably quite sufficient 

 to separate this genus from all of the other genera now included in 

 the Coccinae of the Fernald catalogue. 



