THE JUMPING PLANT-LICE OR PSYLLIDiE OF THE NEW WORLD. 83 



Genitalia. — Male. — Anal valve about as long as forceps, posterior 

 margin more or less angulately arcuate caudad; forceps long, slender, 

 slightly curved forward, and arcuate toward each other, inner surface 

 concave basally, subacute at apex. Female. — Genital segment 

 almost as long as rest of abdomen, acute at apex, dorsal valve a 

 little longer and less acute than ventral. 



Described from many males and females from Colorado (type); 

 Los Angeles, California (Coquillett) ; Bear Paw Mountains, Montana 

 (Hubbard and Schwarz), September 17; Canastota, New York 

 (Faure), hibernating on grass stems, March 12, 1913. Miss Patch has 

 examined a number of specimens from several localities in Colorado: 

 Boulder, Fort Collins (E. D. Ball), and Palmer Lake (Gillette). 



Type.— C&t. No. 18084, U. S. Nat. Mus. 



Because the species seems to be most common in the west the dis- 

 covery of many hibernating forms in northern New York is especially 

 interesting and deserving of some attention. The present data does 

 not show whether the species has a wide distribution, or whether 

 this portion of New York is merely an isolated point in its distribution. 



The hibernating forms are very similar in all respects to the summer 

 forms, except that the color of the body and wings is uniformly 

 much darker. 



TRIOZA ALBIFRONS Crawford. 



Figs. 7, 188, 344, 361, 514. 



Trioza albifrons Crawfor-d' 10a.: 2Zl; '10b:355; 'lla:438. 

 Trioza rotundipennis Grawfohb '10a:236; '11a: 425. 



Length of body 1.9 mm; length of forewing 2.4. General color 

 brown to orange; head brownish, except margin of vertex light; 

 pronotum whitish; praeescutum and scutum with Ught stripes; 

 genital segment of male whitish; antennae white on basal third, 

 remainder black. 



Similar in many respects to qv/idripunctata and closely related to 

 it, differing as follows: Body smaller; thorax narrower, not much 

 broader than head; vertex bulging less conspicuously in front. 

 Legs more slender and relatively longer; apical spines of hind tibiae 

 small, sometimes only two on inside instead of three. Wings usually 

 more broadly rounded at apex, without marginal spots which are 

 present in the related species; venation similar in most respects, 

 but Rs relatively longer. Male genitalia similar; anal valve less 

 angulate on posterior margin (profile); forceps shorter. Female 

 genitaha similar. 



Described from numerous specimens of both sexes from Stanford 

 University, CaUfornia (Crawford), February and March, 1912, on 

 Urtica holoserecia; Nordhoff, California (Crawford), March, 1911, 

 on same host; Claremont, California (Baker); Bear Paw Mountains, 

 Montana (Hubbard and Schwarz), September 17. 



Type in author's collection. 



