86 PROC. ENT. soc. WASH., VOL. 21, NO. 4, APR., 1919 



vSubfam. DIASPINAE. 



Genus Aspidiotus Bouche. 



Aspidiotus hederae (Vallot). 



This, the only Diaspinae included in the collection received 

 from vSr. Jorgensen, has been identified by Mr. E. R. Sasscer. It 

 was obtained at Buenos Aires, Argentina on Nectandra acutifolia, 

 May, 1911, under collection number 23, and was found in the 

 bottoms of small cup or pocket galls formed on the leaves of the 

 host and protruding from the surface. Since it was possible to 

 find an occasional Psyllid nymph in the same situation, how- 

 ever, it appears certain that the latter insect and not the Aspi- 

 diotus was responsible for the formation of the galls. 



EXPLANATION OF PLATES. 

 Plate 4. 



(All of these photographs are 2*/2 times enlargement.) 

 Fig. 1. Icerya minima, n. sp. adult females. 



Fig. 2. Eriococcus mendozae, 11. sp., sacs of adult females on host. 

 Fig. 3. A sterolecanium viridulum Ckll., adult females on host. 

 Fig. 4. Birchippia americana Leon., adult females on host. 

 Fig. 5. Eriococcus leguminicola, n. sp., sacs of females on host. 

 Fig. 6. Ceroplastes deciduosus, n. sp., incompletely developed adult females. 

 Fig. 7. Ceroplastodes misiones, n. sp., tests of adult females on host. 

 Fig. 8. Ericoccus jorgenseni, n. sp., sacs of adult females on host. 

 Fig. 9. Pseudokermes nitens Ckll., adult females, somewhat injured by 



lepidopterous larva which has w T ebbed the specimens. 

 Fig. 10. Akermes bruneri Ckll., adult females on host. 

 Fig. 11. Saissetia argentina, n. sp. adult females on host. 



Plate 5. 



(The designations of the body spines figured in this plate are as follows: 

 A. anal lobe spine; D. dorsal spine; M. marginal spine.) 



Fig. 1. Eriococcus mendozae, n. sp.: A. antenna, X66; B. fore leg, X66 

 C. hind leg, X66; D. hind coxa showing pores, XI32; E. body 

 spines, X256; F. apex of hind femur showing pores, X132; G. 

 dorsal cupshaped gland duct, X256; H. apex of abdomen showing 

 anal lobes and ring, dorsally to left, ventrally to right, with the 

 characteristic number and position of the dorsal spines and the 

 ventral hairs, XI 32. 



Fig. 2. Eriococcus leguminicola, n. sp.: A. antenna, X6G; B. fore leg, X66; 

 C. hind leg, X66; D. hind coxa showing pores, XI 32; E. body spines 

 from Mimosa, X2;~>6; F. body spines from Caesalpinia, X256; 

 G. young larva from dorsum, X66. 



Fig. 3. Eriococcus perplexus Hempel: A. antenna, XlHi; B. fore leg, X66; 



