48 



Provision is also made for the construction of public dipping tanks, 

 and for declaring, with the consent of the owner, a private dipping 

 tank to be public. Fixed charges are paid by the owners of cattle 

 that are dipped in a public dipping tank. 



Little (A.). The Fowl Tick [Argas persicns). — Rhodesia Agric. JL, 

 Salisbury, xvii, no. 6, December 1920, pp. 542-545. 



The bulk of the information given here on Argas persicus has already 

 been noticed [R. A.E.. B, vii, 95]. 



Sanborn (C. E.). The Chicken Sticktiglit Flea [Sarcopsylla gallinacea, 

 Westw.). — Oklahoma Agric. Expt. Sta., Stillwater, Bull. 130, 

 February 1920, 8 pp., 4 figs. [Received 6th January 1921.1 



The information contained in this revised bulletin [R.A.E., B, viii, 

 84] on Echidnophaga (Sarcopsylla) gallinacea, Westw., has been noticed 

 elsewhere [R.A.E., B, iii, 148, 232; iv, 35]. 



McCuLLocH (I.). Crithidia eiiryophthalmi, sp. no v., from the Hemip- 

 teran bug, Euryophthahnus convivus, Stal. — Univ. California 

 Pitbns. Zool., Berkeley, xviii, no. 5, 29th December 1917, pp. 

 78-88, 35 figs. [Received 6th January 1921.] 



The flagellate, Crithidia eiiryophthalmi, sp. n., is described from the 

 digestive tract of Euryophthahnus convivus found in large numbers 

 in late summer and early autumn feeding upon Lupimis arbor etts on 

 sand dunes at San Francisco. This flagellate is compared with C. 

 leptocoridis, parasitic in Leptocoris trivittatus. The life-cycle and 

 morphology of C. euryophthalmi in E. convivus are described. 



Plath (O. E.). a Muscid Larva oi the San Francisco Bay Region 

 which sucks the Blood of Nestling Birds. — Univ. California 

 Pubns. Zool.. Berkeley, xix, no. 5, 7th February 1919, pp. 191- 

 200. [Received 6th January 1921.] 



The injury done to nestling birds by the larvae of Phorniia {Proto- 

 calliphora) azurea, Fall., and P. chrysorrhea, Meig., is discussed, and 

 earlier records of parasitism by fly larvae are quoted. It is estimated 

 that from 5 to 10 per cent, of parasitised nestlings die from loss of blood, 

 and that some of those that do become full-fledged are so weakened 

 that they fall an easy prey to their enemies. The subject has been 

 more fully dealt with in a subsequent paper [R. A.E., B, viii, 68]. 



McCuLLocH (I.). A Comparison of the Life Cycle of Crithidia with 

 that of Trypanosoma in the Invertebrate Host. — Univ. California 

 Pubns. Zool., Berkeley, xix, no. 4, 4th October 1919, pp. 135-190, 

 5 plates, 3 figs. [Received 6th January 1921.] 



Among the conclusions arrived at in this paper are : — The crithidial 

 flagellates of the life-cycle of Trypanosoma are structurally like those 

 of the life-cycle of Crithidia. From the viewpoint of comparative 

 morphology the difterences existing between the crithidial forms of 

 C. eiiryophthalmi and the crithidial forms of T. lewisi are less marked 

 than are the difterences between similar stages of T. lewisi- and 

 Trypanosoma {Schizotry panum) cruzi. 



