298 ENTOMOLOGICAL NEWS. [July, '07 



2. Neopasites heliopsis Robertson. 



Lincoln, West Point, Springview and Warbonnet Canon, 

 Sioux County, Nebraska, June 21 to September 11, on Solidago 

 rigida, Grindelia squarrosa and Aster in the fall, and on 

 Senecio in the summer. 



3. Neopasites robertsoni Crawford. 



I took several specimens of this species August 27, 1902, 

 on Solidago rigida along with N. heliopsis, which was much 

 more abundant. Mr. Crawford records it from West Point, 

 August 30, 1903 on the same flower. 



Genus HELEGTA Latreille. 



1 . Melecta interrupta Cresson . 



Warbonnet Canon, Glen, Long Pine and West Point, Neb- 

 raska, June 30 to August 16 at flowers of Cleome serrulata, 

 Petalostemon violaceus and Monarda sp. 



2. Melecta miranda Fox. 



The preceding species is characteristic of the Transition zone 

 and is replaced in the Upper Sonoran by this species. Lincoln, 

 Weeping Water, Glen and Gering, Nebraska, season and 

 flowers the same as for interrupta; also found occasionally 

 upon flowers of Helianthus annuus. 



Genus BOMBOHELEGTA Patton. 



1. Bombomelecta pacifica Cresson. 



Warbonnet Canon, Monroe Canon and Halsey, Nebraska, 



May 28 to June 6, flying at flowers of various species of 



Astragalus. 



VIERECKELLA new genus. 



Labial palpi 4-jointed, as long as glossa, two basal joints 



long and flattened, two distal joints short and sub-cylindrical, 



proportionate length as 10.5: 6: 1.7: 1, Maxillary palpi 



5-jointed, the first four joints elongate and cylindrical, the 



basal joint thickest, joint 2 slightly more slender and much 



longer, joint 3 subequal to but more slender than 2, 4 about 



two-thirds as long as 3, joint 5 extremely minute, visible only 



upon close microscopic scrutiny. Glossa long, one and one-half 



times as long as the mentum, lanceolate. Mandibles with a deep 



