55 



experimental proof, and this should be attempted. There is a continual 

 appearance of circumstantial evidence that some other insect or warm- 

 blooded animal, or both, influence the progress of the epidemic. 



The unknown factors, which cause the greatest confusion at present, 

 are the length of the incubation period, the number of mild, abortive 

 or unrecognisable cases and carriers of the virus and their relation 

 to infection and immunity, the duration of infectivity in clinically 

 recognised cases, and the presence of the infective agent in insects, 

 domestic animals or other possible intermediate hosts or reservoirs 

 of the virus. 



Dyar (H. G.). The Species of Finlaya allied to terrens Walker (Diptera, 



Culieidae). — Inseciitor Inscitiae Menstrims, Washington, D.C.,ix, 

 no. 10-12, October-December 1921, pp. 151-153. 



The species recorded are : Aedes (Finlaya) podographicus, D. & 

 K., from Mexico ; A. (F.) heteropus, sp. n., bred from water in bamboo 

 joints, from Costa Rica ; A. (F.) terrens, Wlk., from Brazil, Trinidad, 

 the Guianas, Panama and Mexico; A. (F.) thorntoni, D. & K., 

 from Nicaragua and Panama; and A. {F .) argyrithorax , Bonne- 

 Wepster & Bonne, 



Dyar (H. G.). New Mosquitoes from Costa Rica (Diptera, Culieidae). — 



Insectdor Inscitiae Menstruus, Washington, D.C., ix, no. 10-12, 

 October-December 1921, pp. 154-155. 



Culex (Carrollia) metempsyta, sp. n., and Haemagogus anastasionis , 

 sp. n., are described from Costa Rica. C. (C.) honnei, n.n., is proposed 

 for the mosquito recorded from Surinam as C. iridescens, Lutz, and a 

 key to the species of the subgenus Carrollia is given, 



Dyar (H. G.). Note on Melanoconion indecorahilis Theobald (Diptera, 

 Culieidae). — Insecutor Inscitiae Menstruus, Washington, D.C., 

 ix, no. 10-12, October-December 1921, pp. 155-157. 



The male of Culex (Choeroporpa) indecorahilis, Theo., is described 

 from Brazil. 



Dyar (H, G.). Note on Culex declarator D, & K. (Diptera, Culieidae). 



— Insecutor Inscitiae Menstruus, Washington, D.C., ix, no. 10-12, 

 October-December 1921, pp. 194-195. 



The view expressed in a paper noticed earlier {R.A.E., B, ix, 72] that 

 Culex bilineatns, Theo., and C. declarator, D. & K., are sjmonymous 

 with C. virgultus, Theo., is not now upheld, and the characters 

 distinguishing these species are given. 



Froggatt (W. W.). Sheep-maggot Fhes and their Parasites. — Agric. 

 Gaz. N.S.W., Sydney, xxxii, pts. 10-11, October-November 1921, 

 pp. 725-731 and 807-813, 7 figs. 



The observations contained in this paper were made during the 

 investigations carried out at the Government Sheep-fly Experiment 

 Station at Warrah in 1920-21. The earUer methods adopted for the 

 destruction of sheep-maggot flies by means of Hymenopterous parasites 

 have already been noticed [R.A.E., B, vii, 100], and subsequent 

 experiments are described. 



