Mr. T. D. A. Cockci-ell on Bees. 29 



tlie following characters : — Third anteiinal joint much shorter, 

 being hardly longer tiian its apical breadth ; fourth also 

 shorter ; flagellum amber-coloured on both sides, though 

 darker above; vvings without the yellow shade; scutelUun 

 and axillae of the same red colour as the mesothorax ; hind 

 femora without a black stain in front, though there is one 

 behind ; second abdominal segment with a large pyriform 

 white mark on each side; the white on segments 2 to 5 

 interrupted sublaterally, 5 with a good deal of red; apical 

 ventral bristles largely pale. 



Iloh. Prospect Lake, Colorado Springs, Colorado, ]\Iay 22, 

 1904 (T. t& TV. CklL). 



Named after the greatest living authority on A[ioidea. 



Nomada sendscita, sp. n. 



$ . — Length 7f mm. 



Kuns in my tables to N. scitiformis and has no supra- 

 clypeal mark, but differs thus : — Face-marks ligliter yellow ; 

 lateral marks larger, reaching to the level of the antennte ; 

 fourth antennal joint shorter, not much longer than lifth ; 

 pubescence of thorax &c. white, not at all yellow ; basal 

 riervure meeting transverso-medial ; spine of anterior cox;i 

 short and red; abdominal markings very pale yellow on (irst 

 segment, bluish white on the others ; apical plate dark red 

 (black in scitiformis). 



Hah. Prospect Lake, Colorado Springs, Colorado, May 22, 

 1904 (7; d& W. CklL). At flowers of a Senecio of the group 

 8. aureus. 



Although this and the last were taken at the same time 

 and place, I do not feel at liberty to consider them sexes of 

 one species. Not only do the tegular differ in colour (bright 

 ferruginous in Frieseana, pale yellow in semi'scita), but the 

 third submarginal cell in semisclta has a small appendicular 

 nervure, wholly wanting in Frieseana and scitiformis. 1\\ 

 life the eyes of Frieseana ? are pale red, of semiscita J" pale 

 yellowish green. 



Xylocopa nautlana, sp. n. 



? . — Length about 30 mm. 



(Similar to X. morio (Fabr.), with the same shining black 

 body, black pubescence, and brown-black wings with a sti-ong 

 purple iridescence. The labrum has the same three pro- 

 tuberances, the clypeus has the same structure, and the 

 punctuation is about the same. The second abdominal 

 segment has very numerous, small, feebly-impressed punc- 

 tures, whereas in viorio it is smooth, with scattered, mostly 



