270 E. T. CRESSON. 



Megachile variolosa, n. sp. 



9. — Very small, long, parallel, much the general form of osmoides, h\ii 

 much smaller and more coarsely punctured, head smaller, not unusually en- 

 larged behind eyes; punctures of thorax large, the pubescence much as in pre- 

 ceding species; wings faintly dusky, darker at tips ; legs with thin white pubes- 

 cence; abdomen shaped and clothed as in osmoide.-t, except that the apex is not 

 clothed with a pale pile, first and second segments witii fine, rather close punc- 

 tures, on third and fourth segments the punctures are suddenly large, being 

 double the size of those on the two preceding segments, on fifth segment they 

 are smaller and on apical segment small and very dense; ventral scopa white. 

 Length .20— .25 inch. 



Two specimens. (Belfrage.) 



Authidinm zcbratnm, n. sp. 



%. — Differs from % occidentalis, Cress., only as fellows: — Large and more 

 robust, the pubescence on head and thorax more yellowish; pro- and meso- 

 thorax immaculate; scutnllum with two pale yellowish spots; abbominal 

 fasciffi broad laterally and gradually narrowed in the middle, not at all emar- 

 ginate. Length .55 inch. 



One specimen. (Heiligbrodt.) This also occurs in Colorado. 



Anthidiuni interriiptuin. 



Megachile inten-upta, Say, Long's 2d Exped. ii., p. 352. 

 Anthidiam curvatum, Smith, Brit. Mus. Cat. ii., p. 215. 



Two % 9 specimens. (Belfrage.) 



Anthidiuin coneinnuin, n. sp. 



5. — Black, densely punctured; sides efface, narrow anterior orbits and a 

 short line behind summit of eyes, yellowish ; sides of face clothed witii a pale 

 ochraceous pubescence; thorax more densely punctured than head, finely so 

 on the middle which has a well impressed longitudinal line; a spot on each 

 side of mesothorax anteriorly, a spot on each basal corner of scutellum, its 

 posterior margin slightly interrupted medially, and the tubercles, yellow; 

 postscutellum, sides of metathorax and pleura clothed with a pale ochraceous 

 pubescence, short and pale on pleura ; tegulfe ferruginous, with a large yellow 

 spot anteriorly; wings fuliginous, paler centrally and at extreme base, a dark 

 streak through marginal cell; legs entirely fulvo-ferruginous, sericeous with 

 pale hairs, tarsi with short yellow hair, tibiae yellowish at extreme base; abdo- 

 men marked as in simile, Cress., the markings being less heavy, and of a pale 

 lemon-yellow color, and the surface more closely punctured; ventral scopa 

 fuscous. Length .35 inch. 



%. — Clypeus and mandibles yellow; basal segment of abdomen tinged with 

 ferruginous, fifth segment with a band similar to that on preceding segment, 

 disk of sixth segment stained with yellovvish ferruginous, apical segment pale 

 yellowish, trilobate at apex, middle lobe small. Length .35 inch. 



Three specimens. (Belfrage.) Much like sinii/e, Cress. (Proc. 

 Ent. Soc. Phil, ii., p. 378), differing principally by the color of the 

 legs. 



