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. Thomomys bottae. 
8——— abantis Roth. (The normal basal pair of lateral spines on 
last joint of hind tarsi dislocated toward the median line 10-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. XXVII, 
412, 446. On ground squirrel. Citellus sp. 
10. sexdentatus Baker (Hind femora with row of spines 11) ’o4. 
Baker Proc. U. S. Nat. Mus. XXVII, 403, 448. On brush rat, Neo- 
toma sp. 
11.——californicus. Baker (First joint of middle tarsi not dis- 
tinctly longer than second 12) ’o04. Baker Proc. U. S. Nat. Mus. XXVII, 
305, 440. On field mouse, Microtus californicus. 
12.———ciliatus. Baker (A single row of bristles on ventral abdom- 
inal segments 13) ’04. Baker Proc. U. S. Nat. Mus. XXVII, 397, 441, 
on chipmunk, Eutamias sp. 
13. fasciatus. (Bosc), Curtis, ’07 Mitzmain Bull. Cal. State 
Board Health IIT, 39. Pulex ’or Bose d’Antic. Bull. Sci. Soc. Phil. 
111 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. 
1 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: 
“T 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.” 
