ART. 17 MASKELL ASTEROLECANIINAE MORRISON" 25 



30/i, with a cluster of spines, including two or three stouter, at the 

 apex ; legs present as conical tubercles, each bearing a well-developed 

 claw with denticle and digitules; spiracles small, placed rather near 

 margin, the anterior and both halves of the split posterior bands of 

 disk pores running to margin more than two wide ; mouth parts not 

 unusual, the beak apparently 1-segmented; marginal setae present, 

 stout conical, spinelike, each set in a heavy basal collar, and each 

 bluntly rounded at apex; spiracular spines present, in pairs, the 

 anterior two on each side close together, the posterior two well sepa- 

 rated, each more or less curved and sometimes with expanded apex, 

 but usually nearly cylindrical, tapering slightly to a rounded apex, 

 average length about 29ju,, with an occasional small slender dorsal 

 seta set in flat base, with a few minute ventral setae near antennae 

 and perhaps elsewhere, and with two conspicuously large (about 46/a), 

 widely separated setae anterior to anal structure and, between these, 

 a pair of smaller setae; also with a ventral marginal row of small 

 slender setae; 8-shaped pores abundant, but all small, distributed 

 uniformly over the dorsal surface in a single marginal row, an 

 irregularly alternating double to triple row immediately below the 

 marginal row, in small ventral clusters adjacent to spiracular spines, 

 and, as more minute, somewhat modified pores, scattered widely over 

 the ventral surface ; tubular ducts present, distributed over the whole 

 dorsal surface, somewhat more numerous near margin; quinqueiocu- 

 lar disk pores confined to region between spiracles and spiracular 

 spines, rarely with more than five loculi; multilocular disk pores, 

 with 10-12 loculi, abundant ventrally in crowded transverse seg- 

 mental bands posteriorly, but in more scattered single segmental rows 

 anteriorly as far as the posterior spiracles, the rows extending prac- 

 tically from margin to margin; with a row of scattered tiny simple 

 disks along the margin about midway between the single and double 

 rows of 8-shaped pores and with others somewhat smaller, scattered 

 over the dorsum and about as numerous as the 8-shaped pores ; cribri- 

 form plates present, in the two rows characteristic of the genus, but 

 relatively very small and inconspicuous, numbers in each row vary- 

 ing from four to seven; general composition of anal region as in 

 other members of the genus ; apical seta stout, about 26/x, long ; dorsal 

 transverse plate somewhat angulate, or notched behind, lateral plates 

 each with a number of conspicuous, heavily chitinized, longitudial 

 folds or wrinkles, and near the inner posterior face, with three stout 

 setae, each about ll/u, in length, and with |our slender setae below 

 at the junction of these plates; anal ring slender, with pores and 

 10 setae. 



Second stage female. — Specimens believed to represent this stage 

 of L. aca^iae Maskell, but from other than the type material, have 



