20 The Philippine Journal of Science 1917 



Genus PHENACASPIS Cooley and Cockerell 

 Type, Chionaspis nyssae Comstock. 



"Scale of female elongated, with the exuviae at the anterior 

 extremity, white. Scale of male much smaller than that of 

 female; elongated with the sides nearly parallel. Pygidium 

 with the terminal pair of lobes more or less sunken into the 

 body, and having their inner edges serrate or crenate, and 

 strongly divergent leaving a notch on the median line. The 

 color and shape of the scales of the two sexes, together with 

 the median notch of the pygidium are the essential characters 

 of the genus." (Cooley.) 



Synoptic table of the species. 



a\ Caudal margin of female with one pair of lateral lobes (Plate III, 



fig. 11 ) inday. 



According to the available literature, the median lobes are dis- 

 tinguishable, but second and third lobes are indicated by pro- 

 minences eugeniae. 



a'. Caudal margin with two pairs of lateral lobes (Plate III, fig. 13). 

 6'. Female scale transparent and thin. 



c\ Female scale circular; groups of lateral circumgenital glands con- 

 tiguous and almost confiuent mischocarpi. 



c'. Female scale elongate; groups of glands distinctly separate. 

 6'. Female scale opaque. 



(f. Female scale nearly 3 millimeters in diameter; thorax enlarged and 



lobed (Plate III, fig. 16) thoracica. 



d". Female scale not more than 2 millimeters in diameter; thorax 

 not enlarged pallida. 



Phenacaspis inday (Banks). 



Chionaspis Candida (not of Green) Banks, Phil. Journ. Sci. (1906), 



1 , 222, PI. 4, figs. 1-5. 

 Chionaspis inday Banks, Phil. Journ. Sci. (1906), 1, 787; Sanders, 



Bull. U. S. Dept. Agr., Bur. Ent., Tech. Ser. (1909), No. 16, pt. 



3, 48. 



Female scale elongate-oval, widened posteriorly, about 2.5 milli- 

 meters long, 1.20 millimeters broad, white, exuviae pale (Plate 

 V, fig. 12). Adult female with abdominal segments lobed; 

 median lobes of caudal margin divergent, minutely dentate, 

 followed by a spinelike plate and a low triangular plate; two 

 lobules of second lobes low and rounded, followed by a spinelike 

 plate (Plate III, fig. 11). Circumgenital glands with median 

 group of 8 orifices, anterior laterals of 14 to 19, posterior 

 laterals of 14 to 16. Male scale white woolly, carinae scarcely 

 definable; about 1 millimeter long. (From the original de- 

 scription.) 



