194 AMERICAN HYMENOPTERA. 



occurred at Rincorn, New Mexico, July Sth, at flowers of Chilopsis 

 (Ckll. B 4) : at Lone Mountain, nearly Silver City, July 6th, in 

 closed flovver of Arge7iioiie ; Lone Mountain, July 7th, at flowers of 

 Sidalcea malvcefl,orn ; Deniing, July 9th, at flowers of Verbesina 

 encelioides, and at Colora'o, New Mexico, July 10th, at flowers of 

 Sphmralcea angustifolia. 



(20.) Calliopsiisi SHbalpinu»$ Ckll., 1894.— Oue from Arizona, sent by 

 Mr. Fox. 



(21.) C'alliopsiis seinirufiis Ckll., 1896.— Two from Arizona, sent by 

 Mr. Fox. 



These bees are hardly true Calliopsis ; in several respects they 

 more resemble Pauurgufi. 



I think C. semirufus is the $ of subalpiuus, notwithstanding the 

 difference of color. If so, the case is a most interesting one, since 

 the 9 has the red abdomen, the S being all black — exactly the 

 reverse of what occurs in certain species of Perdita. 



(22.) Calliopsis obciirelliis Cress. 



One from Southern California, sent by Mr. Fox ; several from 

 Pasco, Washington, May 25th (T. Kincaid). Thus the species 

 appears to occupy the whole Pacific Coast of the United States. 



(23.) Pauiii'giiiiis iiiiiiiptiiM (Ckll ). 



Calliopsis innuptns Ckll., Ent. News, 1896, p. 222. — Colorado. 



The type was a % . I have the 9 fi'om Colorado Springs, Colo., 

 and also from Nowlin County, South Dakota, one lent by Mr. Fox. 

 The 9 resembles the S , but the face is all dark ; it is very much 

 like C. perlcevi^, but is known from it by the ferruginous hind tarsi, 

 the dark flagellum and the quite pellucid wings. 



(24.) Paimrgiims alriceps (C;r.). 



Calliopsis alriceps Cress., Tr. Am. Ent. Soc, vii, p. 67, % . — California. 



Mr. T. Kincaid has taken both sexes in numbers at Seattle, Wash- 

 ington, during the first half of May; also at Olmypia, May 28th 

 to June 2nd. Oue % , Seattle, May 14th, was at flowers of Ritbiis 

 ursinus. The 9 resembles the S , but is more robust, with shorter 

 antennte and a broader abdomen. It is a smooth insect with a dark 

 flagellum like asteris, rudheckue, albitarsis, ornatipes and bidentis. 

 The tegulte are black or piceous, conspicuously darker than in any 

 of the above five species. The first recurrent nervure meets the 

 transverso-cubital as in clypeatus, but the 9 clypeatus has the fla- 

 gellum ferruginous beneath. 



