THE JUMPING PLANT-LICE OE PSYLLIDiE OF THE NEW WOELD. 23 



about as long as rest of abdomen; dorsal valve longer than ventral, 

 somewhat sinuate on dorsal margin. 



Described from many males and females from the following 

 localities: Agricultural College, Michigan (C. F. Baker); Ames, Iowa 

 (C. W. Mally); New York; Washington, District of Columbia (Hub- 

 bard and Schwarz), February, March, June, and November: Mary- 

 land, February; Herndon, Virginia, m June. 



LIVIA CARICIS, new species. 



Figs. 28, 221, 424. 



This species is in many respects very similar to vernalis. The size 

 is usually distinctly smaller, sometimes very much so. The general 

 color is similar, but often darker, sometimes almost black. The 

 principal differences in structure are as follows: Vertex relatively 

 shorter, usually broadest at front margin of eyes and converging 

 anteriorly thereafter, protruding less over antennae and protruding 

 portion thicker, less deeply emarginate in front, not raised on mar- 

 gins ; second antennal segment relatively longer and larger, flagellimi 

 shorter, only about two and a half times as long as II. Forewings 

 thinner, similar in shape, usually less opaque, similar m venation, 

 except M+Cu relatively longer, and Cu, shorter and more arcuate. 



Genitalia. — Male. — Genital plate small, rounded; forceps small, 

 stout, not pyriform nor constricted as in vernalis, truncate at apex, 

 with a slight constriction just below apex, more densely pubescent; 

 anal valve short, only slightly longer than forceps, rectangular. 

 Female. — Genitalia similar in general to vernalis. 



Described from several males and females from Boulder, Colorado, 

 collected by E. Bethel on Carex, in July; many males and females 

 from Colorado (no data) ; Santa Fe, New Mexico (H. S. Barber), May; 

 Lake Tahoe, California, May, 1879; Placer County, California. 

 (A. Koebele), September; Siskiyou County, California (Koebele); 

 Park City, Utah (Hubbard and Schwarz), June; Bear Paw Mountain 

 (Hubbard and Schwarz), September; Oregon (Koebele); Glacier, 

 British Columbia (Hubbard and Schwarz) ; Northern Illinois ; Pen 

 Mar, Pennsylvania (Hubbard and Schwarz); Brunswick, Maine 

 (A. S. Packard). 



Type specimen in author's collection. 



The differences between this and vernalis are somewhat inconstant, 

 except those of the genitalia. The antennal and cephalic characters 

 approach in similarity to such an extent that it sometimes becomes 

 difficult to distinguish the two species on these characters alone. The 

 differences in the male genitalia, however, seem to be constant. Miss 

 Patch ('12a :7) mentions the Colorado forms of vernalis as somewhat 

 distinct and gives to them the name of variety a of that species. 

 6060°— Bull. 85—14 3 



