IDENTIFICATION OF ROCKY MOUNTAIN COCCID^E 1 95 



On roots of grass and Gutierrezia in New Mexico; 2 to 3 mm. long, pale brown varying 

 to yellowish, pale grey and pale pink; no lateral or caudal filaments; ovisac 

 compact, elliptical, much like that of an Eriococcus; antennae 8-jointed . 



neomexicanus (tinsley) 



On grass in an alkaline spot at Roswell, N. M., covered with mealy white secretion, 

 and with short thick cottony caudal tassels, and lateral tassels posteriorly; sac 

 thin but dense, covering all but hind end; eggs red neomexicanus alkalinus, ckll. 



In nests of Lasius americanus, Las Vegas, N. M.; ifmm. long; pink, varying to pale 

 sage green; mealy; no lateral or caudal tufts; no well-defined ovisac 



neomexicanus indecisus (ckll.) 



On mesquite {Prosopis) in the Mesilla Valley, N. M. . . prosopidis (ckll.) 



On roots of grass, Romeroville, N. M.; pink, with a slight lateral fringe, and well- 

 developed short caudal tassels, no ovisac observed ; antennae 8-jointed . 



. roseotinctus, (t. & w. ckll.) 



On potato and Solanum rostratum, underground, Colorado and New Mexico; 



antennae 8-jointed, joint 2 much longer than 3 . . . . solani (ckll.) 



On Atriplex canescens in the Mesilla Valley, N. M., infesting the twigs; joint 2 of 



antennae shorter than 3 solani atriplicis (ckll.) 



On Fouquiera splendens in the Mesilla Valley, N. M.; about 3 mm. long, covered by 



a white sac; antennae 8-jointed, joints 2 and 3 equal . . . townsendi (ckll.) 



On Larrea in New Mexico; very similar to the last, but differing in details of the 



antennae etc. ........ steelii (ckll. & townsend) 



On sprouts of potato at Fort Collins, Colo., April 1903 (C. P. Gillette); about 2\ mm. 

 long, hind part of body elevated by a copious but short ovisac, in which the 

 yellow eggs are laid; color of insect varying from very pale yellow to pink; 

 antennae 8-jointed, joints 2 and 3 subequal; immature forms have a very dis- 

 tinct fringe of white filaments, as in P. citri; (differs from solani by the fringe, 

 rather smaller size, and antennae) ..... trifolii (forbes) 



Note. — P. hymenoclece (ckll.) occurs on Hymenoclea monogyra in Arizona; P. 



texensis (Tinsley) occurs on Acacia farnesiana in Texas; P. wheeleri (King) occurs in 



nests of the ant Camponotus maculatus var. sansabeanus in Texas. 



ERIUM, CRAWFORD 



In a white globular sac on Artemisia, New Mexico and Colorado (Boulder, Colorado 



Springs, etc.) ........ lichtensioides (ckll.) 



Note. — E. irishi (Ckll.) occurs on Larrea in Arizona. The limits of Erium are 

 uncertain; perhaps it ought not to be separated from P seudococcus . By the white sac, P. 

 steelii and townsendi may be considered to belong to Erium, but they have not the globular 

 form. 



RI PERSIA, signoret 



On Sporobolus depauperatus above. ground; antennae of female 6-jointed, first three 



joints subequal (Las Vegas, N. M.) ..... sporoboli, ckll. 



On roots of plants, usually in nests of Lasius ....... 1 



