no. 1818. BEES IN THE NATIONAL MUSEUM. 2—COCKERELL. 247 



erably exceeding dorsal, moderately bent downward; penultimate 

 ventral segment sparsely punctured basally, densely striatulate at 

 apex. 



Habitat. — Trong, Lower Siam, two females, one in poor condition 

 (W.L.Abbott). 



In Bingham's table this runs to C. confusus Smith, and indeed it 

 has been identified by Doctor Ashmead as this species. I believe 

 it is distinct, from the characters cited by Bingham for confusus, 

 the two being separable as follows: 



Clypeus higher than usual, but otherwise normal; last ventral segment rather broad, 

 though with nearly straight sides; apical margin of scutellum turned upward; 

 abdomen strongly though sparsely punctured, the basal segment like the others. 



siamensis. 



Clypeus very large, transverse anteriorly; last ventral segment extremely narrow; 

 apical margin of scutellum not turned upward; abdomen finely punctured, the 

 punctures most dense on basal segment confusus. 



Bingham does not specifically state that the hind scutellar margin of 

 confusus is not upturned, but Nurse describes C. perseus as the only 

 Indian species having this character. 



C. lepotaxis Enderlein, from Sumatra, seems also to be allied. 



In its general superficial appearance C. siamensis much resembles 

 C. penetatrix Smith, from Willowmore, Cape Colony (Brauna). 



Type.— Cat. No. 13532, U.S.N.M. 



EPEOLUS PUSILLUS Cresson. 



Victoria, Texas, April 1, 1907, at flowers of Callirrhoe involucrata 

 (Nuttall), one male (J. D. Mitchell). 



STELIS COSTALIS Cresson. 



One male; Dallas, Texas, May 11, 1908 (R. A. Cushman). 



STELIS LOUISA, new species. 



Male. — Length about 7 mm., similar to S. costalis, but second r. n. 

 meeting second t. c; clypeus with a very broad yellow transverse 

 band, lobed above, leaving the upper part and lower margin dark; 

 pleura with a large chrome yellow patch; coxae, trochanters, and 

 femora, except at apex, black; apices of femora and all of tibiae and 

 tarsi, pale yellowish-ferruginous, the anterior tibiae quite yellow in 

 front; first abdominal segment more coarsely punctured, its band 

 broader, with the posterior excavations ferruginous; second segment 

 with only lateral spots; fifth with only a small transverse yellow 

 mark in middle, but bands on third and fourth as in costalis (prob- 

 ably these abdominal markings are variable); short hair on and 

 about apex of sixth segment black. The labrum is dark, whereas 

 in costalis it is clear red. The insect is smaller and narrower than 

 S. costalis. 



Habitat.— -Mound, Louisiana, May 12, 1905 (C. R. Jones). 



Type.— Cat. No. 13533, U.S.N.M. 



