1899.] NATURAL SCIENCES OF PHILADELPHIA. 69 



fuscous brown, with that on tarsi black ; on the other legs it is 

 black, except on the medial tibine outwardly, where it is rather 

 similar to that of the fore legs ; abdomen shining black, the first 

 segment anteriorly with pale pubescence ; the apex of first and the 

 second to fourth dorsal segments quite nude ; the apex of fifth 

 dorsal fringed with dark hairs; second to fourth ventrals fringed 

 apically and clothed medially with long black hairs; sixth segment 

 with black hairs, the pygidium triangular, with a triangular raised 

 area at base which sends out a carina from its apex which reaches 

 nearly to tip of pygidium; wings subhyaline. Length 12 mm. 



cJ, — Similar to ? in coloration, but with the mandibles within 

 toward the base, the inner orbits as high as insertion of antennae 

 and a line on scape, yellow ; first joint of flagellum not as long as 

 two following united; lab rum semicircular, not emargiuate; daik 

 pubescence of ventral surface of thorax not so evident as in the ? . 

 Length 12 mm. 



Texas. One female and two male specimens. A female speci- 

 men from lower California agrees in coloration with this species, 

 but there is a slight difference in the shape of pygidium. I am 

 not quite certain that it is the same, however, as the first abdominal 

 segment is scarcely pubescent, 



10. Centris lanosa Cress. 



Centris lanosa Cresson, Trans. Am. Ent. Soc, iv, 284, J^. 



Centris latiosa CocliereU, 1. c, 397, ^ (non 9), 1897. 

 Texas; New Mexico: Las Cruces, The pale patch at base of 

 hind tibise externally is characteristic of this species. The pubes- 

 cence of femora varies from brown to pale. 



11. Centris subhyalina n. sp. 



9. — Black, including clypeus and labrum; head in front and 

 on cheeks with grayish pubescence, that on vertex pale fulvous ; 

 clypeus strongly punctured, with a raised smooth line down centre, 

 the fore margin narrowly reddish-testaceous; labrum semicircular, 

 strongly punctured, its outer margin narrowly reddish-testaceous; 

 flagellum obscurely testaceous beneath from apex of second joint , the 

 latter a little longer than the following three joints united; scape 

 not pale; thorax with pale fulvous pubescence above extending half 

 way on sides, where it is met by black-brown pubescence which 

 clothes the under surface; pubescence of middle segment and first 



