NEW AJIERICAN BEES. 



293 



is no doubt that they are distinct. In the male it is hard to 

 distinguish campanulcs from subexilis, but campanulcs has the 

 wings evidently darker. The male of M. angelarum is not 

 known. The Gila River is the type locality for M. semiexilis. 



Colletes myroni, n. sp. 



2 . Length, 9 mm. or a little over, rather robust ; thorax above 

 with bright orange- fulvous hair {with no black) ; hair of head entirely, 

 and of pleura, black ; that of sides of metathorax thin and pale 

 yellowish ; hair of legs black, except on inner side of tarsi, where it is 

 orange-fulvous ; abdomen oval, rather small, very shiny, with scat- 

 tered extremely minute punctures (close at extreme base of second 

 segment) ; fii-st segment with long pale yellowish hair (some black at 

 extreme sides) ; remaining segments with rather inconspicuous black 

 hair, but second with some scattered pale yellowish hair on disc, and 

 a feeble apical band of short whitish hair. Clypeus densely, coarsely, 

 more or less confluently punctured ; labrum shining, with a central 

 pit, the edges of wdiich are raised ; antennae entirely dark ; facial 

 depressions large and broad ; vertex shining ; mesothorax shining, 

 with distinct, rather close punctures ; no visible prothoracic spines ; 

 tegulae shining black ; base of metathorax with the pits irregular, 

 more or less transversely ridged, and less distinctly bounded behind 

 than is usual ; wings dusky, with piceous nervures ; first r. n. joining 

 second s. m. before its middle ; second r. n. with a strong double 

 curve ; hind spurs simple. Malar space short, more than twice as 

 broad as long. A remarkable species, looking like some forms of 

 Andrena, as A. berberidis. The shining black abdomen suggests 

 C. nigrifrons, Titus, but that species is narrower, has quite differently 

 coloured hair on thorax above, and small narrow facial depressions. 

 I do not know of any species which can be said to be closely allied. 



Hah. Boulder, Colorado, May 2Gth, 1908 (S. A. Rohwer). 

 Named after Mr. Myron H. Swenk, in recognition of his very 

 valuable work on the genus Colletes. 



Panurginus didirupa, n. sp. 



<? . Length about 7 mm. ; in the table in Ent. News, 1907, p. 184, 

 runs to P. ornatipes, to which it is very closely allied. It differs from 

 P. ornatipes by the longer antennae, the entirely black scape, the 

 supraclypeal mark (which is almost exactly square) extending half its 

 area above the general level of the lemon-yellow of the face, and the 

 hind tibiae black except at extreme apex. Clypeus very strongly 

 punctured, without any median groove (in P. boylei there is a very 

 distinct groove) ; flagellum entirely black ; dog-ear marks small, 

 cuneiform ; front densely punctured ; mesothorax shining ; wings 

 strongly dusky ; second and third abdominal segments broadly de- 

 pressed basally, this area covered with fine silky brownish-grey hair ; 

 hind tarsi with first tw^o joints yellow, the others brown. 



$ . Almost exactly like P. ornatipes, but the shining apical de- 

 pressions of the abdominal segments are minutely granular (smooth 

 in ornatipes), and the area of the metathorax is better defined. Wings 



