SUBFAMILY ERIOCOCCINAE 141 



erell and should be credited to him. The type species, rumicis Maskell 

 is from New Zealand on Rumex. The other species are kelloggi Ehrh. 

 & Ckll. from California on roots of bunch grass; leucosoma Ckll. from 

 New Mexico from the nests of Lasius; and maritima Ckll. from Long 

 Island, New York on roots of Spartina. 



Natalensia Brain. This genus is based upon a single species, 

 fulleri Brain from Natal from roots of grass from nests of ants. By the 

 table this genus will run to Ripersiella Ckll. The circular form of the 

 body, the antennae consisting of six segments, and the anal ring bear- 

 ing six anal ring setae in nymphal and adult females, are characteristic. 

 The adult female is enclosed in a double-walled cyst without openings. 



Rhizoecus Kunck. An European genus of four species: eloti 

 Giard from roots of coffee-tree; falcifer Kiinck. from roots of palms and 

 vines; (?)targionii Ckll. on Mammillaria; and (?)terrestris News, on 

 roots of Stephanotis. 



Bipersia Sign. This genus is of indefinite limits. The following 

 American species have been referred to it: aurantia Ckll. from New 

 Mexico from nests of Lasius; blanchardii King & Ckll. from Massachu- 

 setts from nests of Lasius; cockerellae King from New Mexico from 

 nests of Lasius; fimbriatula Ckll. & King from New Mexico from nests 

 of Lasius; flaveola Ckll. from Massachusetts, New Mexico from nests 

 of Lasius; kingii Ckll. from Massachusette from the nests of ants; lasil 

 Ckll. from Canada, Massachusetts on roots of asters and from the nests 

 of ants; magna T. & W. Ckll. from New Mexico; minima Tins. & King 

 from Massachusetts from nests of Lasius; myrmecophila Mask, from 

 Michigan; porterae Ckll. from New Mexico on the roots of grass; salmon- 

 acea Ckll. from New Mexico on roots of grass; serrata Tins, from Trini- 

 dad; sporoboli Ckll. from New Mexico on Sporobolus; tenuipes Ckll. 

 from New Mexico on the roots of grass; trichura Ckll. from New Mexico 

 from the roots of grass; trivittata Ckll. from New Mexico from nests of 

 Lasius; villosa Ehrh. from California on Quercus; and viridula Ckll. 

 from New Mexico from nests of Lasius. 



Cryptoripersia Ckll. Two species have been referred to this 

 genus, Eriococcus salinus Ehrh. from California on Distichlis and Riper- 

 sia arizonensis Ehrh. from Arizona, California on Elymus. Ferris has 

 examined the types of both species and has pronounced them identical. 



Fonscolombia Fonsc. There are two European species: fraxinl 

 Kalt. on Fraxinus and radicum-graminia Fonsc., the type, on roots of 

 grass and grain and two American species: braggi Ckll. & Robs, from 

 Colorado on Berberis and yuccae Ferris from New Mexico on Yucca. In 

 yuccae there are numerous cerores in the region of the vulva which are 

 wanting in braggi. 



Termiticoccus Silv. Two species, aster Silv. from Paraguay and 

 bicornis Silv. from Brazil, collected in the nests of termites, not from 

 ant's nests as recorded in Fernald's Catalogue, belong to this genus. 



Pseudoripersia Ckll. A genus including a single species, turgipes 

 Mask, from Australia on Casuarina. 



Gymnococcus Dougl. The type of this genus is agavium Dougl. 

 from Europe. The genus contains two American species found upon 

 grass, nativus Parr, from Kansas and ruber Parr. & Ckll. from New 



