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



atively few scattered spines, at least an occasional one on the abdominal 

 margin distinctly or even conspicuously larger than the average sized dorsal 

 abdominal spines; the actual size of the corresponding spines in different 

 specimens apparently quite variable, particularly in lots from different 

 host plants, but all showing the same approximate relationship between the 

 marginal and dorsal abdominal spines, these body spines fairly stout, tapering, 

 somewhat curved, slender at apex, but with the tip bluntly rounded, lengths 

 as follows: from Mimosa sp., marginal, largest noted 43^, but most about 

 35 ju or a little less, dorsal abdominal, largest noted 19ju, smallest 7 n; on Caesal- 

 pinia sp. largest marginal 29 M, average length about 20-22 n, largest dorsal 

 abdominal noted about 16^, average size 8-10^; on Leguminosae, largest 

 marginal noted about 42 /u, average size about 25-28 /x, largest size dorsal 

 abdominal noted about 21 yu, smallest about 9/uJ number, size and position 

 of the ventral abdominal hairs not determinable from the material available 

 for study; cup-shaped gland bases deep, rather narrow, slightly asymmetrical, 

 the duct leading to the surface long and slender. 



Young Larva. About 0.5 mm. long when mounted on slide, but varying, 

 stoutest and widest anteriorly, tapering posteriorly; antennae 6-segmented, 

 both these and the legs large in proportion to the size of the body; hind coxae 

 apparently without pores, tarsus a little less than twice the length of the tibia; 

 abdomen dorsally with eight rows of spines, the median pair on each segment 

 small, the submarginal and marginal pairs much larger, all six of these in 

 line transversly, and with the fourth spine on each side small and placed 

 anterior to and a little outside of the large marginal spine on each segment; 

 ventrally with four hairs near the median line and another, almost spine- 

 like hair near the lateral margin on each side; anal lobes with three relatively 

 large spines dorsally, a very long apical hair and another, ventral hair, some- 

 what longer than the anal ring hairs; anal ring with six hairs, and with a 

 rather large .hair close to each side but separate from the anal ring; with a 

 few multiocular gland pores ventrally and apparently with an occasional 

 very tiny indistinct cup-shaped gland dorsally. 



Male Puparium. Elongate oval, about 1.5 mm. long, slender, convex, 

 the anterior half nearly circular in transverse section, dorsum flattened 

 posteriorly, caudal apex terminating in a horizontal semicircular slit as wide 

 as the body, dirty white in color; adult male not observed. 



This species has been described from 16 specimens mounted on 

 slides and a number of unmounted specimens still in position 

 on the host plants; the material has all been collected under the 

 number 3346 and is from Bomplana, Misiones, Argentina, from 

 Mimosa, Caesalpinia and an unstated Leguminosae, collected 

 June, 1910. 



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



In spite of the considerable number of specimens mounted; it 

 has not proven possible to obtain very satisfactory slide mounts 

 of any of this material and there is in consequence a little doubt 



