1 86 ENTOMOLOGICAL NEWS. [May, '07 



2. Protandrena cockerelli Dunning. 



Distribution the same as that of asclcpia dis ; specimens of 

 both sexes are from Lincoln, Neligh, Cams, and Benkelman, 

 Nebraska, taken July 1-26, on Petalostemon viola-ecus, Sola- 

 nnm ro stratum and Cassia chaniacchrista. The two species 

 may be separated thus: 



FEMALES. 



Tubercles and a spot on tegulae yellow ; supraclypeal area black, a yel- 

 low subtriangular mark occupying the upper half of clypeus ; 

 wings heavily clouded asclepiadis Ckll. 



Tubercles black, tegulae rufo-piceous, without yellow ; supraclypeal area 

 mostly or entirely yellow, sides of face with yellow spots, the 

 upper half of clypeus yellow, with two black spots ; wings 

 much less clouded *. . cockerelli Dunning. 



MALES. 



Tubercles and a spot on tegulae yellow ; upper margin of yellow area on 

 face uneven, highest medially ; less shiny . . . asclepiadis Ckll. 



Tubercles dark, tegulae rufo-piceous, without yellow ; upper margin of 

 yellow area on face perfectly straight, more shiny. 



cockerelli Dunning. 



Appendix : For the convenience of students, we wish to 

 take the opportunity of here describing another interesting new 

 Spinoliella. 



Spinoliella hesperia n. sp. 



?. Length 7 mm. ; clypeus, except two very small basal black dots, 

 labrum, mandibles except tips, supraclypeal area, dog's ear marks and 

 lateral face marks extending above level of antennae and running up 

 in a narrow line along orbits nearly to vertex, bright yellow. Vertex 

 with two large, irregular yellow spots, which occupy most of the 

 area between the lateral ocelli and the eyes. Antennae black, with 

 the front of the scape yellow and the flagellum brownish beneath. 

 Thorax black, the prothorax with a narrow transverse yellow band, 

 the tubercles, postscutellum and a spot at base of tegulae also bright 

 yellow, rest of tegulae black. Wings clear, nervures dark brown. 

 Abdomen black, the middle of segments 1-4 with very broad, bright 

 yellow transverse bands, interrupted medially on I and 2, very broadly 

 on 2, complete on 3 and 4. Legs black, with all the knees, first four 

 tarsi, anterior tibise and intermediate tibiae, except for large spots on 

 each side, yellow. Front, whole of thorax, legs and tip of abdomen with 

 short, erect, fairly dense gray pubescence. 



o*. Length 6 mm. ; face marked as in $ except that the lateral marks 



