1922 ] On some Trophobiotic Coccidce from British Guiana 133 
Only preadult specimens and one partially molted adult 
could be located in the material submitted, and mounts of such 
specimens have been carefully compared with the corresponding 
stages from cotvpe material received by the Bureau of Entomo- 
mologv from Prof. Adolph Hempel, the describer of the species. 
Some slight differences in the length and stoutness of the heavy 
spines crowding the derm of the preadult have been observed, 
but no other morphological characters that even suggest that 
the specimens from British Guiana represent another species 
than S. asper. In the absence of other stages, as larvae and well 
developed females and males, in which specific differences 
might appear, it seems best to regard the specimens from British 
Guiana as Hempel’s species. 
SUBFAMILY DACTYLOPIIN^ 
GENUS PSEUDOCOCCUS WESTWOOD 
Pseudococcus bromeliae (Bouche) 
References.— Ferris, Journ. Econ. Ent. vol. 12. no. 4, Aug. 
1919, p. 196 — Morrison, Phil. Journ. Sci. vol. 17, no. 2, Aug. 1920, 
p. 173. — Cockerell, Science n.s. vol. 55, no. 1492, 1922, p. 351. 
After extended critical study the writer has placed as this 
species the material from Dr. Wheeler’s collections listed below 
together with his notes on the same. 
“No. 116. Kartabo, B. G. July 17, 1920. In the cavities 
of the stems of a seedling Cecropia ( angulata I. W. Bailey). 
The ants belonged to a black species of Azteca not yet identified.” 
“No. 247. Kartabo, B. G. July 23, 1920. The coccids 
were in the hollow bases of the leaf-petioles of a Tachigalia 
paniculata Aublet with a black species of Azteca ( Azteca foveiceps 
Wheeler).” 
“No. 367. Kartabo, B. G. Aug. 3, 1920. In node-like stem 
swellings of Cordia nodosa Lani. var. hispidissima Freser, with the 
ant Brachymyrmex sp. (probably heeri Forel).” 
No number. “Kartabo, Julv-Aug. 1920. In the swellings 
