24 



canicularis, L., and F. scalaris, F., obtained from decomposing indivi- 

 duals of Helix, and Ravinia haematodcs, Meig., from dead snails. The 

 larvae of the last named usually feed on excrement. 



Trico (P.). El Banadero de las Ovejas. [The Sheep-Dipping Tank.] 

 — Gaceta Rural, Buenos Aires, xv, no. 171, October 1921, pp. 329- 

 337, 3 figs. 

 Full directions are given for the construction of a dipping tank for 



sheep similar to one now being built in the province of Buenos Aires. 



Dunn (L. H.). The Lake Mosquito, Mansonia titillans, Wlk., and its 

 Host Plant, Pistia stratiotes, Linn., in the Canal Zone. — Proc. 

 Med. Assoc. Isthmian Canal Zone, January- June WIS, Mount 

 Hope, C.Z., xi, pt. 1, 1921, pp. 7-20. [Received 29th November 

 1921.] 

 The information contained in this paper on Taeniorhynchus 



{Mansonia) titillans has already been noticed [R. A.E., B, vii, 3]. 



Dunn (L. H.). The Tick as a possible Agent in the Collocation o£ the 



Eggs of Dermatohia hominis. — Proc. Med. Assoc. Isthmian Canal 



Zone, January- June 1918, Mount Hope, C.Z., xi, pt. 1, 1921, 



pp. 21-25. [Received 29th November 1921.] 



The information contained in this paper has already been noticed 



[R.A.E., B, vii, 10]. 



Dunn (T. H.). Studies on the Iguana Tick, Amblyomma dissimile, 

 in Panama. — Proc. Med. Assoc. Isthmian Canal Zone, July- 

 December WIS, Mount Hope, C.Z., xi, pt. 2, 1921, pp. 7-18. 

 [Received 24th November 1921.] 

 The contents of this paper have been noticed from another source 



[2?.^.ii., B, vii, 44]. 



Hanson (H.). A Review o£ the Malaria Incidence on the Canal Zone. 

 (Period 1904 to 1918, inclusive.)— Proc. Med. Assoc. Isthmian 

 Canal Zone, Januarv-December 1919, Mount Hope, C.Z., xii, 

 pt. 1-2, 1921, pp. 27-29. [Received 24th November 1921.] 

 A review of the incidence of malaria among employees of the Panama 

 Canal from 1904 to 1918 shows an increased rate of total cases for 

 1918. This is probably accounted for by the large number of men 

 working where active mosquito control could not be practised. The 

 rate within the areas where regular sanitation is practised is progres- 

 sively decreasing ; this decrease can, however, only be maintained by 

 unrelenting vigilance. Algae soon form in neglected drains, and thus 

 afford favourable conditions for the breeding of Anopheles albimanus. 



Hanson (H.). A Study o! Sanitary Conditions in Peru with special 



Reference to the Incidence of Malaria. — Proc. Med. Assoc. 



Istlimian Canal Zone, January-December 1919, Mount Hope, 



C.Z., xii, pt. 1-2, 1921, pp. 41-54, 18 plates. [Received 



24th November 1921.] 



The sanitary conditions of Lima and its suburbs are described. 



Mosquito breeding is very prevalent, but could be controlled and 



finally eradicated if attacked in a systematic and intelligent manner. 



Anopheles breed most extensively in the river bed at Chosica, in the 



seepage areas at Surco and in the swamp on the Lima-Ancon railway. 



