AMERICAN PSYLLIDiE V 



BY D. L. CRAWFORD 

 STANFORD UNIVERSITY, CALIFORNIA 



Since completing the work of recasting the family and redescribing many 

 species as based upon the collections then at hand, other accessions have come 

 in from various localities. Among a collection sent to me by Mr. E. P. Van Duzee 

 are three new species; two species have been sent by Prof. T. D. A. Cockerell, and 

 others of interest have been collected in Southern Califorrvia. Among the latter 

 are several very interesting, though previously known species, inhabiting coniferous 

 trees at an altitude of about ten thousand feet above the sea. 



Peiratrioza ocellata Crawf. 



This species, originally described from Colorado, has been collected in Mil- 

 ford, Utah (Bradley), and in Imperial County, California (J. C. Bridwell). On 

 a spruce (species unknown to writer) on the summit of Old Baldy, near Clare- 

 mont, Calif., this species was found in countless thousands, infesting the leaves 

 and small twigs. A slight disturbance of the branches would drive them forth 

 to swarm about like gnats or midges. This apparently was limited to the one 

 species of spruce. 



Trioza varians Crawf. 



Two specimens, a male and a female, were sent to me by E. P. Van Duzee, 

 collected in the Selkirk mountains, British Columbia (Bradley). 



Trioza aurantiaca Crawf. 

 Specimens of this common species were taken by the writer on wild willow 

 (Salix lasiolepis) at Laguna Beach, Calif., and near Stanford University, Calif., 

 on the same food-plant. 



Psylla americana Crawf. 

 This species is very abundant, especially throughout the west, at all altitudes. 

 Several specimens were collected at Laguna Beach, Calif. (Crawford) on Salix 

 lasiolepis and some on the summit of Old Baldy at 10,000 feet altitude on Pinus 

 ponderosa and spruce. 



Psyllopa magna n. sp. 



(Figure 209, B, D) 



Length of body, 2.3 mm.; length of forewing, 2.7 mm.; greatest width, 1.1 



mm.; width of vertex between eyes, 0.61 mm.; with eyes 0.92 mm. General color 



yellowish brown to brown; notum faintly striped; facial cones a little lighter; 



cubital cell of forewing brown. Insect quite large, robust. 



Head broad, deflexed, with eyes fully as broad as thorax or broader; vertex 

 almost plain, with a slight foveal impression on each side of median line in rear 

 center; anterior margin strongly elevated above base of cones, slightly emarginate 

 at median line, with anterior ocellus in front. Facial cones moderately large, 



