OF WASHINGTON. 141 



Type. — Bureau of Entomology No. 14095. Collected on 

 mangosteen at Buitenzorg, Java, by Dr. Treub, and on mango 

 at Boro Boedor, Java, by the writer December 13, 1901. 



Note. — This species resembles P. trilobitifoniiis in general 

 appearance, but differs in the character of the lobes and in 

 the absence of paragenitals and in the very slight development 

 of the tessellated patch. 



EXPLANATION OF PLATE VIL 



0, Pseudaonidia trilohitiformis, scale of female; b, same, dorsal view 

 of female; c, same, ventral view of female; d, same, anal segment of 

 female; e, Pseudaonidia moorei, scale of female; /, same, ventral view 

 of female; g, same, anal segment of female. (From Green.) 



THE SALT-MARSH GRASS SCALE. 



(Chionaspis spartince Comst.) 

 By E. R, Sasscer. 



The salt-marsh grass scale is a native of this country and 

 was originally described ^ from specimens on Spartina stricta 

 (= glabra) collected at Woods Holl, Mass., by Mr. Trelease. 

 Subsequently it was received at the Bureau of Entomology, 

 United States Department of Agriculture, on this grass from 

 Bluffton, S. C, and on an undetermined species of grass from 

 Cataumet, Mass., and Santa Clara County, California. On 

 November 30, 1907, it was found in abundance on Spartina 

 glabra Muhl, by the writer at Will's Island in the Port Tobacco 

 Creek, Charles County, Maryland. These seem to be the only 

 authentic records of the occurrence of this scale and are all 

 represented by material in the collection of Coccidse of the 

 Bureau of Entomology. 



This scale insect is of peculiar interest owing to its maritime 

 habits, being exposed to salty sprays and frequent submergence 

 in brackish water. The little island spoken of above is com- 

 monly covered with water at very high tide. 



The scales of both males and females are situated on the 

 inner side of the leaves, with exuviae uppermost, often over- 

 lapping on account of the large number present. 



" Chionaspis spartina Comst., 2d Rep. Dep. Ent. Cornell Univ., p. 106 

 (1883). 



