jouknal of entomology and zoology 193 



Male 

 (Fig. 7) 



The male is only about half as large as the other forms and is 

 usually easily recognized by the small size and slender yellowish 

 body. 



The front and lateral margins of the head, antennae, legs, muscle 

 lobes are dusky and the remainder of the body varies from yellowish 

 in most individuals to pale yellowish-green in others. Occasionally 

 the posterior end of the abdomen is faintly dusky. The length is 

 about 0.85 mm. and the width 0.3 mm. The head is nearly as wide 

 as the prothorax with the front and lateral margins dusky. The 

 eyes are red. The antennae are dusky, 6-articled, entirely covered 

 with many transverse or concentric rows of very small spine-like 

 hairs. The lengths of the articles are about as follows: I, 0.015 

 mm. ; II, 0.0 1 2 mm. ; III, 0.063 mm. ; IV, 0.035 mm. ; V, 0.033 mm. ; 

 VI, 0.034 mm; total, 0.192 mm. The sensoria are transverse and 

 vary from 5 to 7 on article III, one on each of article IV and V 

 and two or more on VI. The prothorax is slightly wider than the 

 head, yellow with dusky or nearly black muscle lobes. The abdo- 

 men is pale yellow or greenish throughout, except that the posterior 

 tip is sometimes dusky. The cornicles are evidently absent as 

 the writer was unable to locate any in eight mounted specimens. 

 Professor Gillette does not figure or mention them in his descrip- 

 tion. The wings are hyaline with the stigma and the costal and 

 subcostal veins prominent. The primary wings are about 1.4 mm. 

 long and 0.5 mm. wide. The secondary wings are about 0.76 mm. 

 long and 0.2 mm. wide. The venation is shown in Fig. 7. The legs 

 are rather long and dusky-yellow in color. The cauda is blunt, 

 dusky and has many long hairs. 



Food Plants 



This insect appears to confine its attacks entirely to different spe- 

 cies of manzanita, there being none of the species of this plant im- 

 mune so far as the writer has observed. In Colorado the common 

 species is called bearberry (Arctostaphylos iiva-ursi). In California 



