SYSTEMATIC TREATMENT 77 



Antonina crawii Ckll. 

 Plate 3, figs. 23, 24. 



1900. Antonia crawii Cockerell, Psyche 9:70. 



1902. Antonina crawii Ckll.; Kuwana, Proc. Calif. Acad. Sci., (3), 3:57, fig. 



1915. Antonina crawii Ckll.; Essig, Inj. & Benef. Ins. Calif., 2d ed., 132-3. 



In life. "The full grown female scales are covered with a thick, 

 compact white cottony coat which makes them very conspicuous. The 

 body proper varies from 1/8 inch to nearly 1/4 inch long, is broadly 

 oval or rounded and deep purplish-red in color. The females collect in 

 colonies, forming large cottony masses in the leaf axils of the canes." 

 (Essig.) From the posterior end of the body there usually arises a con- 

 spicuous white, waxen thread. 



Morphological characteristics. General form elongate, tapering 

 somewhat posteriorly. The adult female is apodous and the antennae 

 are reduced to mere conical stubs with three segments. Last two seg- 

 ments of the abdomen quite heavily chitinized and bearing numerous 

 short, spike-like spines, the remaining segments with just a few very 

 small spines at the margins. Entire body with numerous small cylin- 

 drical ducts. A longitudinal area of circular pores at the lateral margins. 



Immature stages. I have seen only the first stage larva. In this 

 the antennae are of the usual type, 6-segmented. At the lateral margin 

 of each of the last three abdominal segments is a group of two or three 

 stout spines which may be the homologues of the cerarii. The anal ring 

 is very heavily chitinized and bears six short, stout, spine-like setae. 



Hosts and distribution. An introduced species found on bamboo, in 

 various parts of California. I have examined species from Ventura re- 

 ceived from E. O. Essig. 



Notes: It is by no means certain that this is really A. crawii Ckll. The 

 California specimens agree with certain specimens taken at Yokohama, Japan, by 

 Kuwana and identified by him as this species. They do not agree with other speci- 

 mens from Tokyo, Japan, likewise identified as this species by Kuwana. In the 

 latter lot the antennae are 2-segmented and the spines on the posterior end of the 

 abdomen are much longer and more slender. 



This differs from A. indica Green, of which I have specimens from Bermuda 

 grass in Hawaii (det. Ehrhorn), in the much more elongate form and the much 

 shorter and stouter abdominal spines. It appears to differ in this latter character 

 from A. nortoni Parrott & Ckll. and A. gramnis Parrott. 



