158 Annals Entomological Society of America [Vol. XI, 



material collected during the dry season of the year is of better 

 quality than that collected during the rainy season, since in the 

 first case the specimens are much less likely to be filled with 

 entomogeneous fungi. For study, the Diaspine specimens 

 were prepared by two methods. Where possible, at least one 

 slide was prepared by the chloroform method in order to pre- 

 serve and bring out the pygidial fringe and slow method caustic- 

 potash slides were used in the study of the internal characters. 



ACKNOWLEDGMENTS. 



This study was conducted under the tutelage of Dr. A. D. 

 MacGillivray. To him the writer expresses his indebtedness. 

 While residing in Cuba, several specimens were sent to Dr. 

 C. L. Marlatt, for identification. These determinations have 

 been of material assistance in checking the identification of 

 others. 



SCOPE OF THE WORK. 



This paper deals mainly with the subfamilies Conchaspinae 

 and Diaspine, though a few species from other subfamilies are 

 listed. Much material from the latter is on hand, still unde- 

 termined. Altogether, 368 lots of material were examined 

 which yielded 36 species and 3 subspecies. One species and one 

 subspecies are described as new to science. In working the 

 material over, the writer felt some disappointment in the com- 

 paratively small number of species which it yielded. He 

 expected at least as many as a collection of similar size from the 

 Temperate Zone would contain. The explanation, however, lies 

 in the fact that in our northern latitude, there is in reality both 

 the Temperate and for the most part the Semi-tropical Zone to 

 draw from; the latter because of the greenhouse and con- 

 servatory fauna, while in the South but one zone is available. 



The arrangement of the species is in the order of their 

 occurrence in Mrs. Fernald's "Catalogue of the Coccidas of the 

 World." On the final pages will be found tables for the 

 differentiation of the species of Conchaspis and Pseudischnaspts. 



ABBREVIATIONS. 



In accrediting the collections the initials of the collector are 

 used. Thus: W. T. H. = Wm. T. Home, M. T. C. = Dr. Mel T. 

 Cook, C. F. B. = C. F. Baker, W. A. P. = W. A. Page, J. W. S. = 

 J. W. Stakley, S. P. S. = Sebastian Pla y Solarichs, E. W. H. = 

 E. W. Halstead, J. S. H. = J. S. Houser. 



