32 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol. 60. 



GENEKIC DIAQNOSIS OF SPHAEROCOCCOPSIS. 



" Dactylopiine " coccids of the Fernald Catalogue, of uncertain 

 location, possibly Eriococcine, but evidently not closely related to the 

 Pseudococcus group of genera; adult female secreting a firm, com- 

 pact, waxy test, almost horny externally, with spongy inner layer 

 and with circular median dorsal opening, the test more or less sunken 

 in a depression in the bark of the host ; adult female circular, like a 

 flattened globule, with a circular to oval dorsal chitinized area; an- 

 tennae more or less reduced ; all legs present, more or less abnormal, 

 the posterior pair much larger than the others; mentum 1-segmented. 

 anal lobes wanting, represented by a pair of long setae and a fringe 

 of large tapering spines above the anal opening; anal ring stout and 

 circular, with setae, and with or without pores, these when present 

 in circles around the setae of the ring ; body with dorsal area bearing 

 numerous hemispherical nodules and surrounded by a circle of spines, 

 also with numerous slender setae ventrally and laterally ; only a single 

 type of derm pore present, these quinquelocular disk pores; larva 

 oval, antennae 5-segmented, legs normal but stout, with rows of dorsal 

 and lateral spines and numerous hemispherical nodules dorsally ; anal 

 ring circular, without setae, and lobes not developed. 



Genus CALLOCOCCUS Ferris. 



Plate 2, fig. 4. 



Genotype. — ISfhaerococcus pulchellus Maskell. 



References. — Fernald, Cat. Cocc. World, 1903, p. 87. — Ferris, Can. 

 Ent., vol. 50, Oct., 1918, p. 328. 



This genus has only recently been established by Ferris to include 

 the single type species. Except for what is believed to be the second 

 stage female, which is described here for tlie first time, the descrip- 

 tions of Maskell and Ferris have covered the species rather thor- 

 oughly, and the writers have noted only a few apparent discrepancies 

 in these descriptions. 



The Maskell collection includes three slides of the type species, 

 one labeled " adult female, 1896," one " adult female, side view, 

 1896," and one " late 2nd stage female, 1896," and a small amount of 

 unmounted material under No. 504, from which it has been possible 

 to otbain additional mounts of the different stages. It may be noted 

 that if the writers have coiTectly identified and described the inter- 

 mediate stage female, then Maskell's " late 2nd. stage 9 " actually 

 represents an early adult form. 



Adult female. — Somewhat elongate oval, sac-like; derm trans- 

 parent except for a longitudinal median, dorsal, perforated, chitinized 

 band, continuing around both apices of the body onto the venter, and 



