Memorias de la Sooiedad Cientifioa 



ovisac about 6 mm. long, slightly striated, but not ribbed, ex- 

 cept faintly at the sides; no glassy filaments; secretion enti- 

 rely pure white; back densely covered with secretion; margin 

 with thick short lamellae; inner surface of ovisac (only visi- 

 ble on breaking it open) primrose yellow. 



The larva differs obviously from that of I. palmeri in its 

 more slender antennas; thus the breadth of the fourth joint is 

 21 u in colimensis, but 30 in palmeri. The club in the larva of 

 colimensis, is hardly at all constricted, and is 135 u long. 



The species occurred on the stem of a shrub, species not 

 determined. 



(3.) Icerya rileyi var. tarns, n. var. — On Larrea, plain at ba- 

 se of Cerro Chilicote in Chihuahua, April 29. (Townsend). Com- 

 pared with the typical rileyi f ron mezquite, the larvae have the 

 antennas more slender, the club however very broad. The se- 

 cond joint is decidedly longer than the third. 



