new and little-known Hymenoptera. 453 



Exomalopsis eriocarpi, sp. n. 



$ . — Length 9 millim. 



Black ; quite densely clothed with short pale ochreous 

 hair, white on pleura, metathorax, face, cheeks, and femora; 

 head considerably broader than long ; face thickly clothed 

 with white hair, but the lower half of clypeus nude, strongly 

 and confluently punctured, with a broad yellow transverse band 

 just above the rufescent anterior margin ; labrum yellow ; man- 

 dibles with a large yellow patch, suffused with rufous, at 

 base ; ocelli large ; sides of vertex punctured ; scape black ; 

 flagellum blackish above, ferruginous beneath except the first 

 joint; mesuthorax and scutellum very strongly punctured, the 

 punctures numerous but well separated ; base of metathorax 

 with irregularly placed punctures ; tegular dark reddish 

 brown, with only a small patch of hair in front ; wings clear, 

 nervures dark brown, stigma obsolete ; second submarginal 

 cell large, nearly square, receiving the recurrent nervure at 

 the beginning of its last third; third submarginal cell little 

 longer than first ; legs black, small joints of tarsi pale testa- 

 ceous, scopa of hind legs wholly light; abdomen suboval, less 

 globose than usual, covered with a velvet-like creamy pubes- 

 cence, the dorsal portion of the first segment and a little of 

 the second bare, these bare parts finely punctured ; hind edge 

 of first segment colourless; first segment without any distinct 

 transverse keel. 



Hob. Fillmore Canon, Organ Mountains, N". M., about 

 5400 feet, Sept. 1, 1898, on flowers of Eriocarpum gracile. 

 Coll. C. H. T. Townsend, six females. 



Hardly a typical Exomalopsis. At the same time and on 

 the same flowers was taken a female Calliopsis coloradensis } 

 Cress. 



Lithurgus echinocacti, sp. n. 



$ . — Length 11^- millim. 



Black, with scanty white pubescence. Head rather large, 

 broader than long, strongly and closely punctured ; white 

 hair conspicuous only at base of antenna?, extreme sides of 

 face, anterior margin of clypeus (here orange-fulvous in the 

 middle), and hind part of cheeks ; two prominent tubercles 

 beneath antenna?, and between them a concave shining area, 

 it itlt scattered, very minute punctures; no distinct depression 

 between the hind ocelli ; anterior edge of clypeus little produced, 

 presenting a rounded notch on each side, but none in the 

 middle; labrum transverse, inconspicuous ; mandibles black, 

 abruptly truncate, not meeting (? worn) ; thoracic dorsum 



