302 TBB CANADIAN RNTOMOLOOI0T. 



truncately excavated lo one-half the depth of ihe segment and black- 

 marked at the base. The lateral flaps obliquely truncate from the slightly 

 rounding lateral angle. Male valve obtusely triangular, plates together 

 moderately broad, triangularly narrowing to the blunt lips. 



Described from three females from Chino and one pair from Visalia, 

 California, collected by the author. Readily separated from the related 

 sj)ecies by the very distinct female genitalia. 



Thamnotettix atridorsum, var. vetu/a, n. var. 



Size and form of atridorsum nearly. Slightly shorter and stouter. 

 Pale creamy yellow above and below, eyes and a small spot on the female 

 segment black. Length, 4.75 mm. 



Described from five females from Kelso, California, and one from 

 American Kork, Utah, all collected by the author. This is app.irenily an 

 ad.:ptalion to a very hot, dry condition, and in.iy prove to be a good 

 species when further material is found. It would hardly be advisable to 

 separate it on a single sex, however. 



Thamnotettix atriiiorsuin, var. vesca, n. var. 



Form and colour o^ att idorsttm nearly, except that it is smaller and 

 much shorter and stouter, with the elytra scarcely covering the apex of the 

 abdomen, the apical cells abbreviated, broader than long. Green, with 

 the vertex and face pale straw-yellow. Length, 4 mm. 



Described from four females and one male from Coronado Beach, 

 Long Beach and Redondo Beach, California, collected by the author. 

 These specimens were all taken along the seashore, on the short vegeta- 

 tion growing just above tide-water, and apparently become adapted to this 

 rigorous condition by reduction in size and especially in wing length. 



Thamnotettix Tituii, var. vivata, n. var. 



Form and general a|)pcarance of Tituii nearly, much smaller, shorter 

 and with less markings on the face. The head is slightly broader than in 

 Titusi, and the front is broader and fuller. The face is pale and slightly 

 smoky, but never dark as in that species. The elytra are darker at the 

 base, inclined to be bluish, and are slightly smoky at the apex, with the 

 veins usually distinct. In two specimens the veins arc light coloured 

 throughout, the pronotum is light margined all around, and there is a 

 transverse smoky marking on the disc of the vertex. Length, 4.5 mm. 



Described from eight examples from Tia Juana. Pasadena and 

 Riverside, California, and Reno, Nevada, all collected by the author. This 



