ABT. rz. MASKELL GENERA OF COCCEDAE — MORRISON. 35 



The following generic diagnosis has been based on the preceding 

 description. 



GENERIC DIAGNOSIS OF CALL0C0CCU8. 



Asterolecanine coccids with the adult female enclosed in a striated 

 waxy test of peculiar form ; adult female an elongate oval sac with a 

 median dorsal chitinized stripe containing numerous pores and ducts ; 

 antennae reduced to tiny disks ; legs wanting ; mentum 1-segmented ; 

 spiracles not unusual; derm with minute 8-shaped pores at bottoms 

 of short ducts, large tubular ducts with swollen inner ends, slender 

 tubular ducts with cup-shaped bottoms and thread-like tube, and 

 quinquelocular disk pores, with only the slender tubular ducts numer- 

 ous; derm with a few small stout setae and no differentiated anal 

 setae; anal lobes completely wanting, anal ring a minute ovate ring 

 without setae ; intermediate stage female elongate, slender, tapering, 

 antennae semirudimentary, 6-segmented, legs reduced, claw digitules 

 if present placed on teeth at base of claw, derm pores reduced to the 

 quinquelocular type only, derm setae much as in adult, anal ring 

 simple, at apex of body ; larva elongate oval, with a marginal row of 

 8-shaped pores and a single quinquelocular pore attached to each 

 spiracle, with small setae dorsally and ventrally in rows, antennae 

 short and stout, 4-segmented, legs normal, digitules normal, anal ring 

 simple, without traces of anal lobes, but with a pair of larger and 

 stouter anal setae. 



The writers at present incline to the belief that this genus will find 

 its nearest known relative in the genus Frenchia, in spite of the 

 occurrence of a considerable number of divergences. 



Genus SPHAEROCOCCUS Maskell. 



Genotype. — ISphaerococcus casvurinae Maskell. 



Refererices. — Fernald, Cat. Cocc. World, 1903, p. 85. — Ferris, Can. 

 i5nt., vol. 51, Nov., 1919, p. 249. 



This genus has just recently been redescribed and more correctly 

 located by Ferris (1919), who has also called attention to some errors 

 in Maskell's description. As S. casuarinae was the only species in- 

 cluded by Maskell at the time he established the genus, it remains the 

 type, and, as noted by Ferris, it is in aU probability the only species 

 of all that have been placed in the genus Sphaerococous that can 

 legitimately remain under that name. 



The Maskell collection contains five slides of this species, all dated 

 1891, one of larva, two of second stage female, and two of adult 

 female. There is also a single gall of Cylindrococcus casuarinae^ 

 under No. 221, which is supposed to bear a specimen of S. casuaHnas, 

 but the specimen is no longer present, and probably became detached 

 while tlie gall was still mounted on a pin. 



