1922] On some Trophohiotic Coccidce from British Guiana 133 



Only preadiilt 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 eotype material received by the Bureau of Entomo- 

 mology 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, July-Aug. 1920. In the swellings 



