156 AMERICAN HYMENOPTERA. 



with silvery hairs on outer and dark rufous hairs on inner side, those on inner 

 side of basal joint of hind tarsi so dark as to appear black in some lights. Ab- 

 domen blue-black, hind margin of first segment narrowly opaque white, hind 

 margins of the remaining segments broadly subtranslucent grayish white; first 

 segment with grayish white pubescence like that of the thorax ; remaining seg- 

 ments dorsally seeming bare, but clothed with short, inconspicuous hairs, white 

 on second segment, basally black and subapically white on third segment, black 

 with a very narrow, white, subapical fringe on fourth segment, brown-black on 

 fifth and sixth segments, apical margin of sixth and apex clothed with silvery 

 haiis; venter with a band of white hairs. 



Hah. — One at flowers of Cnicus, Mr. Clark Rodger's ranch, Lone 

 Mountain, near Silver City, New Mex., July 7, 1896, about 6000 

 feet. A male Xylocopa arlzonensis Cr. was visiting the same flowers. 

 The Cnlcns resembles ochrocentrus, but the flowers are of a very 

 beautiful crimson-pink color, such as I have not seen in thistles 

 elsewhere. 



P. cardui seems to be nearest to P. smithii Cresson, but it diflTers 

 in the color of the pubescence and the clypeal spots. In the latter 

 character it resembles P. iva/.^hll, but the tarsi are not as in that 

 species. 



(21.) Epeolus verbesinse n. sp. %. — Length from 7-16 mm., but this 

 apparent great variation is due in large part to the contractility of the abdomen 

 which may thus differ greatly in apparent length in specimens of the same size; 

 the length of the anterior wing varies from about 6. ,5- 8 mm. Black, with 

 creamy white markings. Legs red. Head short, considerably broader than long; 

 vertex flattened, closely and subconfluently punctured, the punctures becoming 

 larger on front ; face, nearly up to level of top of scape, covered with appressed 

 snow-white pubescence, becoming thin on lower part; cheeks with similar, but 

 thin pubescence: a few hairs, bending forward, just behind the middle ocellus; 

 antenna; moderately long, black ; the scape and first joint of flagellum dark ru- 

 fous, sometimes black ; funicle minute, scarcely emerging from scape, easily over- 

 looked ; first joint of flagellum shorter than third, which is shorter than second ; 

 the white pubescence of thorax is arranged much as in other species, but the 

 markings are very distinct and well defined : there is a band, narrowed medially, 

 on hind border of prothojax, two short stripes passing backward on mesothorax, 

 a broken band passing over the tegulte, narrow bands at hind margins of meso- 

 thorax and scutellum, and such a band on postscutellum ; the pleura and meta- 

 thorax, except the hairless enclosure, are also white pubescent; the scutellum is 

 quadrituberculate ; enclosure of metathorax smooth in middle and densely punc- 

 tured at sides; mesothorax densely and confluently punctured: tegulje dull 

 orange ferruginous. Wings hyaline, with black nervures, outer margins broadly 

 dark gray: second submargiual cell greatly narrowed above, sometimes almost to 

 a point. Legs red, with the usual sparse white pubescence, spurs of middle and 

 hind legs black. Abdomen dull black, with clear-cut, creamy white markings: 

 first segment with a large white triangle on each side, one corner of which joins 

 the band ; the bands on segments 1-5 are all rather broadly interrupted in the 

 middle, narrowing subdorsally and the swelling, so that their mesad terminations 



