ART. 12. MASKELL GENERA OF COCCIDAE MORRISON. 57 



merit's strongly marked by lateral and dorsal constrictions; antennae 

 reduced to minute unsegmented tubercles, placed at the anterior end 

 of the body and each bearing about six small spines; legs entirely 

 wanting; spiracles large, each set in a deep pocket in the chitinized 

 derm, with a patch of small tubular glands behind each posterior 

 spiracle; derm with numerous clear pores scattered over both sur- 

 faces, at the bottom of which are small triangular pores or tubular 

 ducts; in addition with circular multilocular disk pores at the pos- 

 terior end of the body; body setae all rather stout and short, a few 

 at the posterior margin of the apical segment longer and more slender, 

 the setae very rare except on the apical abdominal segments, where 

 they are rather numerous ventrally, especially along the middle line; 

 apical abdominal segment sometimes faintly bilobed; anal ring a 

 heavy band placed a little dorsally and at the inner end of a short 

 tubular invagination, ring bearing numerous small pores and six 

 setae, slender and projecting a little beyond the circular opening of 

 the tube. 



Intermediate stage female (possibly adult before maturity). — Oval 

 with the posterior apex of the body, only, chitinized and brown, the 

 apical segment very broadly rounded, the remainder of the derm clear 

 and membranous; antennae, mentum, legs and anal region as m 

 adult, derm pores and setae along the margin of the body apparently 

 much more numerous than in adult in proportion to size. 



Larva. — Body elongate, parallel-sided, the ends rounded ; antennae 

 C-segmented, the apical segment as long as the three preceding 

 together ; legs normal, rather slender, claw simple, digitules all long, 

 slender, slightly knobbed; mentum short and stout, obscurely 2- 

 segmented; derm with marginal rows of large triangular pores, 

 dorsally with a submedian row of smaller but similar pores and 

 an additional submarginal row anteriorly, ventrally also with a 

 row of much smaller pores, this row submarginal posteriorly and 

 submedian anteriorly, finally with a group of such pores at each 

 spiracular opening; posterior dorsal ostioles conspicuous, anterior 

 not noted ; the abdominal segments with a pair of rather stout spine- 

 like setae on each margin, one larger, one smaller, those on the apical 

 segment large, the remainder gradually decreasing in size anteriorly, 

 apical segment also with a pair of much longer, slender anal lobe 

 setae ; anal lobes developed only as very slight protuberances, with a 

 few pores and six short slender setae. 



Maskell placed one other species, first described by him as a Sphae- 

 rococcus, and now known as Antonina graviinis (Maskell), in this 

 genus in 1898. This species closely resembles Sphaerococcus casuari- 

 nae Maskell in size and shape, and when the intermediate stages are 

 known may require a modification of the statement under Sphaero- 

 3136— 22— Proc.N.M.Vol.60 .'52 



