382 ENTOMOLOGICAL NEWS. [Oct., '08 



On California Ground Squirrel Citellus beecheyi. 



7 - ignotus, '04. Baker Proc. U. S. Nat. Mus. XXVII, 388, 416, 

 443, 458, '06. Baker U. S. Nat. Mus. XXIX, 134. 



On California pocket gopher. Thomoinys bottac. 



abantis Roth. (The normal basal pair of lateral spines on 

 last joint of hind tarsi dislocated toward the median line lo-or labial 

 palpi, extending beyond coxae 9) '05 Roth. Novit. Zool XII, 164. 



'06. Baker Proc. U. S. Nat. Mus. XXIX, 132, 146, 161, 164. 



9. proximus Baker, '04. Baker Proc. U. S. Nat. Mus. X.XVIT, 

 412, 446. On ground squirrel. Citellus sp. 



10. sexdentatus Baker (Hind femora with row of spines u) '04. 

 Baker Proc. U. S. Nat. Mus. XXVII, 403, 448. On brush rat, Nco~ 

 tonia sf>. 



ii. californicus. Baker (First joint of middle tarsi not dis- 

 tinctly longer than second 12) '04. Baker Proc. U. S. Nat. Mus. XXVII, 

 395, 440. On field mouse, Micro tits californicus. 



12. ciliatus. Baker (A single row of bristles on ventral abdom- 

 inal segments 13) '04. Baker Proc. U. S. Nat. Mus. XXVII, .597, 441, 

 on chipmunk, Eutamias sp. 



13. fasciatus. (Bosc), Curtis, '07 Mitzmain Bull. Cal. State 

 Board Health HI, 39. Pulex '01 Bosc d'Antic. Bull. Sci. Soc. Phil, 

 in No. 44, 156. European rat flea. On rats and mice and occasionally 

 on other animals and man. Demonstrated to be an agent in the con- 

 veyance of bubonic plague on the Pacific Coast. 



C. CTENOPSYLLIDAE. 



i Ctenopsyllus musculi (Duges) Wagner. 

 1898 Wagner Horae Soc. Ent. Ross XXXI, 577. 



Pulex 1832 Duges Ann. d'Sci. Nat. XXVII, 163. The European 

 mouse flea on rats and mice. 



WE HAVE RECEIVED an interesting letter from Dr. McCook. He says : 

 "I have just finished the MS. of my book 'Ant Communes and How 

 They Are Governed ; A Study in Natural Civics.' It will be issued 

 next spring by Harpers, who printed my 'Nature's Craftsmen' a year 

 ago. In connection with the first part of that book it will complete my 

 popular studies of ants, giving a summary of my long observations and 

 bringing the leading facts of their known habits up to date. My first 

 printed studies were of the Pennsylvania carpenter ant, Camponotus 

 pennsylvanicus, and appeared in the Transactions of our American 

 Entomological Society, December, 1876, thirty-two years ago ! Ah, 

 what changes in that generation. Next year is our fiftieth anniversary. 

 Should we celebrate the semi-centennial? We should at least have a 

 special historical number." 



