October iV)] 



PSYCHE. 



419 



in correlation witli the development of the 

 acid and alkaline glands of that species. 



This paper also records a number of mis- 

 cellaneous observations upon the cleanliness 

 of ants' nests, the vitality of queens, etc. 

 and portions of the paper are republished in 

 Nos. 12 and 13. 



Note iS is a valuable contribution to the 

 literature upon the hymenopterous sting. 

 The organ in Myrmica is thoroughly de- 

 scribed and figured, the results of other 

 workers being supplemented by numerous 

 original observations. The apparatus con- 

 trolling the llow tVom the poison gland is 

 described for the first time in Note iS, from 

 which No. i^ is an extract. 



Note 19 is an important paper of nearly 

 sixty pages upon the anatomy of the thor- 

 acic region which, as including the median 

 segment, is termed corselet. Eight clear 

 figures express the forms and relations of the 

 thoracic sclerites. Only one who has under- 

 taken a similar subject can appreciate the 

 success with which the author has explained 

 the positions and functions 'of the thoracic 

 muscles, especially those concerned in flight. 

 Although the paper deals chiefly with a sin- 

 gle species in a purely descriptive way, the 

 character and number of the illustrations, 

 abundantly facilitate the comparison of 

 Myrmica with other groups hy the moiphol- 

 ogist. Paper No. 15 is a rejietition of a part 

 of Note 19. 



The amount of study represented by the 

 interesting papers of Janet is frequentl3' dis- 

 guised by the author's conciseness of expres- 

 sion. 



THE PANURGINE BEES. 



With reference to Mr. Ashmead's article on 

 pp. 372-376, the following remarks may be 

 appropriate : — 



(I.) Perdita {Corkerellia) Jtyalina $ has 

 the hind claws simple, and the front and 

 middle claws deeply cleft. So also fasonis 



and other allied forms. I have examined 

 Cresson's type of hyalina in Philadelphia. 

 The $ of beata, the type of PhiloxaiitJius. 

 is unknown. 



(2.) Pciiaudrena Rob., has nothing to 

 do with Piiniii-gimis ! 



(3.) BiiircoliiHi is ordinary Andrena with 

 two submarginal cells ; Cullaudreiia is appar- 

 ently dei'ivcti from a very distinct section of 

 Aiidrciia belonging to North America (y4. 

 pulchella &c.). It is quite impossible to 

 imagine that these genera have any blood- 

 relationship, except through Aiidrenii ; con- 

 setpiently, they cannot be united. 



(4.) Hemihalictiis is I believe, an Ameri- 

 can derivative of Halictus., its resemblance 

 to Dufourea being due to convergence. 

 There is a marked difference in the venation, 

 the first recurrent nervure in Ditfouyea 

 joining the second submarginal cell at its 

 extreme base, while in Heiiii/ialic/iis it joins 

 it not far from the middle. Mr. Ashmead 

 tells me, however, that he has seen an 

 undescribed species presenting intermediate 

 characters. 



(5.) Ilfspcrafis (not Hesperaspis) is very 

 distinct from RhofhUoidei by the short 

 dagger-like tongue, as originally described 

 by me. 



(6.) Pscudopunurgui is a compact and 

 easily recognized group, belonging to the 

 arid region ; it is a matter of taste whether 

 one calls it a genus or a subgenus of Pa:iui- 



(7.) Nomadopis, I can now accept, 

 because the species on which it was founded 

 is not the Perdita zonalis Cr., but a species 

 quite distinct from any Perdita. I had the 

 pleasure of seeing it recently in the Nat. 

 Museum. 



It is hardly necessary for me to say, that I 

 value extremely Mr. Ashmead's table of bees ; 

 and disagreement as to details must not be 

 taken for disparagement of the whole. 



T. D. A. Coc/ierell. 



N. M. Agr. Exp. Sta. 



