94 REPORT UPON A COLLECTION OF 



Habit. Occurring in cracks in the bark and about the buds. There 

 is no scale, but a small amount of wax is secreted. The adult female is 

 inclosed within the black, heavily chitinized second exuvium of the second 

 stage. The male is inclosed within the hardened exuvium of the first 

 stage, from the posterior extremity of which arises a very short secre- 

 tionary scale. 



Morphological characteristics. Adult female, when removed from 

 the enclosing second exuvium, about .5 mm. long, irregularly oval in 

 form (Fig. 16D), membranous throughout except for the heavily chiti- 

 nized pygidium. Pygidium (Fig. 16A) terminating in nine quite long and 

 slender lobes, the central one of which is somewhat the longest, the others 

 successively slightly shorter. Anal opening near the anterior margin of 

 the pygidium. Pores and ducts entirely lacking. 



Second stage with the pygidium (Fig. 16B) without lobes, slightly 

 acute at the apex. 



First stage larva with the antennae short, 6-segmented, the terminal 

 segment not elongate and not annulate ; the pygidium without lobes or 

 gland spines. 



Adult male apterous but otherwise of the usual Diaspine type; the 

 ocelli in a dorsal and ventral pair ; the body terminating in a slender 

 style, entirely hairless; antennae (Fig. 16C) 8-segmented, rather short 

 and strongly clavate. 



Notes: In my original description of the genus Ancepaspis, I stated that 

 the male of this species had no secretionary scale, which is erroneous as there is 

 a very small but still distinct amount of secretion. This species is probably most 

 closely related to A. tridentata (Ferris). 





 Ancepaspis tridentata (Ferris). 



1919. Protodiaspis tridentata, Ferris : "Contribution to the Knowledge of the 



Coccidae of Southwestern United States," Stanford University Publica- 

 'tions, p. 46, fig. 22. 



1920. Ancepaspis tridentata (Ferris), Ferris: Can. Ent., 52:32. 

 Previous records. From Prosopis velutina, Arizona. 



Lower California records. From Prosopis sp. at La Paz and several 

 other points. It is very abundant in the area visited. 



Genus XEROPHILASPIS Ckll. 

 Xerophilaspis prosopidis (Ckll.). 



1919. Xerophilaspis prosopidis (Ckll.), Ferris: "Contribution to the Knowledge 

 of the Coccidae of Southwestern United States," Stanford University 

 Publications, p. 58, fig. 31. 



Previous records. From Prosopis in Arizona and California. 

 Lower California records. From Prosopis at La Paz. 



