some Parasitic Bees. 39 



to be also a distinct species, allied by the punctuation of the 

 pleura to T. pectoralis (Rob.). 



Triepeolus heJlanthi (Rob.) . 



I have confused this with T. Cressom, wliich it very closely 

 resembles. I have a female from Illinois, sent by Robertson 

 years ago as Epeolus mercatus. Another female was collected 

 by Mr. C. E. Mead, Sept. 19, 1898, at the Experiment 

 Station near Aztec, New Mexico, at flowers of Verhesina en- 

 celioides. A specimen from near San Ign icio, N. M., formerly 

 recorded as Cressoni, is nearly 13 millini. long, but appears to 

 be the same species. 



Triepeolus heUaniJn, var. arizonensis, var. nov. 



cJ. — Small, length about 8 millim. 



Wings clearer, marginal cell considerably shorter and more 

 rounded at end ; labrum red; pubescent margin of first abdo- 

 minal segment not broken anteriorly or posteriorly ; fringe 

 on fourtii and fifth ventral segments fuscous. 



Uab. Phoenix, Arizona, at flowers of Helianthus annuuSj 

 October 9 {Cockerell). 



Perhaps a distinct species. The legs are coloured as in 

 helianth), the anterior legs being very dark. 



Triepeolus Cressoni (Rob.), vav. fraserce, var. nov. 



(^ . — Variable in size, from about 8 to nearly 11 millim. 



Antennae and labrum entirely black ; mandibles black with 

 a red spot ; hind femora red, middle femora with a black mark 

 above; tegulffi reddish to piceous ; nervures black except 

 towards base of wing, where they become reddish ; hair-stripes 

 on mesothorax broad, flame-like, connected with a broad 

 hairy anterior border. 



Known from helianthi by the entirely hairy pleura, and 

 from occidentalis by the black anterior femora &c. 



Hah. Beulah, New Mexico, about 8000 ft., June 29. at 

 flowers of Frasera [W. P. Cockerell), July 12 {W. P. Ck'll), 

 July 12 (T. D. A. GJclL) ; Las Vegas, N. M., at flowers of 

 Sphceralcea Fendleri lohata, July 24 ( W. Porter). I think the 

 insect recorded from Beulah by Mr. Viereck a.& E. occidentalis 

 must have belonged to the present form. 



Epeolus crucis, sp. n. 



9 . — Length about 7^ millim. 

 This is the species, found at Las Cruccs by Professor C. H . T. 



