82 PROC. ENT. SOC. WASH., VOL. 21, NO. 4, APR., 1919 



seta about as long as one of the spines; spiracular region normally with three 

 spines larger than the marginal, but sometimes with an additional pair of 

 differentiated spines, the median the largest, averaging 5771/j. long, the 

 second pair averaging proportionally to the median 36-57 n long, the third 

 pair when differentiated, still smaller; dorsally with an occasional small 

 spine-like seta set in a well-developed socket; ventrally with a median pair 

 of long slender hairs on several segments anterior to the anal plates and with 

 a pair of unequal size hairs near the antennal bases; dorsal glands apparently 

 wholly of the long-tubed cup-shaped base type, these scattered dorsally 

 but rather numerous along the body margin; with an anterior and a posterior 

 dorsal pair of peculiar circular structures, probably the same as the submarginal 

 tubercles of Coccus and related genera, each pair quite close to the corresponding 

 end of the body; ventrally apparently with only circular multiocular disk 

 pores, the scattered row running from each spiracle to the spiracular spines 

 small, about 4/j, diameter and with about 6 oculi, those occurring in bands 

 and clusters in considerable numbers around and anterior to the anal plates 

 much larger, about 7/u in diameter, and apparently with about 12 oculi; 

 anal plates about 133 /j. long and 71 n wide, each triangular, with the posterio- 

 lateral side longer than the anterio-lateral, with a distinct apical seta, usually 

 broken off, about 32 ^ long, with three dorsal setae, the first about one-fourth 

 of the plate length from the posterior apex and near the inner margin, the 

 second a little further from the apex and nearer the outer margin of the plate 

 than the inner, the third distinctly nearer the cephalic than the caudal apex 

 of the plate and quite close to its inner edge; with three setae rather close 

 together on the ventral ridge, the outer the largest, protruding beyond the 

 plate apex; with a single large fringe seta on each side; anal ring apparently 

 with 6 hairs, but this not determinable with certainty. 



This species has been described from 5 females mounted on a 

 slide and a number of unmounted specimens in position on the 

 host plant, which appears to be a Compositae, although not 

 named. The material is from Bomplana, Misiones, Argentina, 

 Oct., 1 ! ) 1 0, on an unstated host plant under collection number 7 10ft. 



The types are in the U. S. National Collection of Coccidae. 



Genus Pseudokermes Ckll. 

 Pseudokermes nitens (Ckll.) 



(PI. 4, fig. 9.) 



This species is represented by material from Bomplana, Misiones, 

 Argentina, on Eugenia uniflora, Oct., 1910, under collection number 

 158a. 



Genus Akermes Ckll. 

 Akermes bruneri Ckll. 



(PI. 4, fig. 10.) 



This species is represented in the Jorgensen collection by one 

 lot of material from Posadas, Misiones, Argentina, on Celt-is tala, 

 April, liMO, under collection number 728. 



