ART. 12. MASKELL GENERA OF COCCIDAE MORRISON. 29 



as those found in casuarinae. The derm bears stout spines as well as 

 slender setae ; the posterior apex of the body is more chitinized and 

 bears in the middle of its disk a pair of heavily chitinized plates, 

 these together forming nearly a circle, and fused along their inner 

 edges with the outer margins of each bearing 4-5 large stout spines; 

 these plates obscuring the anal ring so that its structure can not be 

 determined definitely, but apparently it is entirely without setae. 

 In the larva only the differences in the body spines have been noted. 

 In the following generic diagnosis an attempt has been made to 

 include both species discussed above within the limits indicated. 



GENERIC DIAGNOSIS OF CYLINDROCOCCUS. 



Coccids forming woody galls, possibly Eriococcine, adult female 

 with cylindrical body, membranous derm with posterior apex more 

 heavily chitinized in form of a more or less circular disk; antennae 

 short-conical, indistinctly segmented, legs abnormal, much reduced 

 or represented by evaginated pouches ; spiracles without multilocular 

 disk pores; mentum 1-segmented; anal lobes wanting, position indi- 

 cated by grouped spines and setae or fan-shaped spined plates ; anal 

 ring simjDle, setae much reduced in number or wanting; body with 

 setae or spines and setae, the setae long, rather stout, much more 

 abundant at apex of abdomen ; with only one type of derm pore, these 

 multilocular, usually quinquelocular disk pores, set at bottom of 

 small tube; larva oval, tapering posteriorly, antennae 5-segmentedy 

 set close together, legs normal, abdomen with rows of long, stout 

 setae dorsally and ventrally; anal lobes well developed, ea li with 

 an apical spine and seta ; anal ring simple, with some spines or setae 

 set close to it. 



The genus was not assigned to any higher coccid group by Maskell 

 when he originally described it, but was placed by Cockerell in the 

 tribe Eriococcini in his Tables for the Determination of the Genera 

 of Coccidae.^ The writers have no further changes to suggest at 

 present. 



Genus SPHAEROCOCCOPSIS Cockerell. 



Plate 2, fig. 3. 



Genotype. — Sphaerococcus infatipe?, Maskell. 



Reference.— F^rn^ldi, Cat. Cocc. World, 1903, p. 85. 



This genus was established by Cockerell on the basis of the presence 

 of legs in the adult female, as contrasted with the condition in 

 Sphaerococcus; actually the two genera, as represented by tlie type 

 species, are very remotely related, if at all. Only the single type 

 species, with its variety, was known when the genus was established, 

 and none have been added subsequently. 



•Can. Bnt.. vol. 81. 1899, p. 277. 



