Descriptions and Records of Bees. 361 



midst of active living organisms. I believe that this is the 

 real reason for the development of side- and covering-plates 

 in the crinoids of the deeper waters, and for their suppression 

 or non-existence in littoral forms and in pelagic forms like 

 Uintacrinus ; and this idea is further borne out by the fact 

 that shallow-water species belonging to normally deep-water 

 groups having large side- and covering-plates have these but 

 feebly developed, while deep-water species belonging to 

 groups ordinarily inhabiting shallow water, and devoid of 

 these plates, are commonly found to possess them. As an 

 instance of the former case may be mentioned Ptilometra 

 maoronema (J. Miiller), of the latter Comatdia iridometri- 

 formisj A. H. Clark, or Nemaster iowensis (Springer). 



L. — Descriptions and Records of Bees. — XXVIT. 

 By T. D. A. Cockerell, University of Colorado. 



Greeley ella resinata, sp. n. 



? . — Length 8-8£ mm. 



Black, with scanty pale pubescence, tinged with yellowish 

 above; mesothorax and abdomen shining; hind tarsi (except 

 for the hair) dark; flagellum variably reddish beneath; first 

 r. n. meeting first t.-c, or entering basal corner of second 

 s.m. Very closely related to O. beardsleyi, Ckll. (syn. Panur- 

 ginus malvastri, Sw. & Ckll.), but differing as follows : — 

 A trifle smaller; abdominal segments beyond the first, instead 

 of being smooth, with small punctures, have the surface 

 microscopically transversely striate ; scutelkvn with a slight 

 median groove or depression ; tegulse darker and smaller ; 

 anterior tibiae &c. not pallid in front. 



Uab. Lee County, Texas (G. Birkmann) ; four females, 

 sent by Prof. C. F. Baker (no. 7107). 



Hulictoides ilicifulice, sp. n. 



J . — Length 5^ mm. or a fraction more. 



Black, with greyish-white pubescence ; wings hyaline, 

 nervures and stigma dark fuscous ; mandibles with the apical 

 half ferruginous, the cutting-edge rather broad, notched ; head 

 broad, eyes strongly converging below ; face with much 

 white hair ; antenna} short for a male, dark, flagellum ob- 

 scurely reddish beneath ; head and thorax shining, the base 

 Ann. & Mag. N. Hist. Ser. 8. Vol. v. 25 



