1917] ECONOMIC ZOOLOGY — ENTOMOLOGY. 255 



Tertian malarial fever. — Transmission experiments with Anopheles puncti- 

 pennis, M. B. Mitzmain {Pub. Health Rpts. [U. S.], 31 (1916), No. 19, pp. 

 1172-1177). — "A. punctipennis has been proved to be a definitive host of tertian 

 plasmodial infection. Under the conditions cited, 32.5 per cent of the 40 

 mosquitoes applied were positive as against 10.5 per cent of the A. crucians. 

 Only 20 specimens of A. punctipennis survived six days or longer after biting. 



" With a blood donor of low infectivity 13 mosquitoes of A. punctipennis 

 showed infection from 6 to 25 days after securing parasitized blood. Eight of 

 the positive specimens became infective as shown by moderate to immense 

 numbers of typical sporozoits invading the salivary glands. In a control series 

 of 19 specimens of A. crucians, two were infective with the parasites of Plas- 

 modium vivaje 11 and 13 days after biting the blood donor. 



" The infectibility of A. punctipennis was demonstrated in the transmission 

 of the disease through the biting of four mosquitoes which reproduced the 

 infection in three healthy volunteers, living in New Orleans during February, 

 1916, after incubation periods of 14 and 15 days. One of these persons had 

 escaped infection four months previously from the bites of more than 200 A. 

 punctipennis in two experiments with the subtertian type. From this single 

 instance it is indicated that A. punctipennis served as a host of P. vivax but not 

 of P. falciparum." 



See also a previous note (E. S. R., 35, p. 361). 



The influence of various concentrations of sea water on the viability of 

 the salt marsh mosquitoes Aedes sollicitans and A. cantator, F. E. Chidesteb 

 and R. Patterson (Ent. News, 27 (1916), No. 6, pp. 272-274).— A preliminary re- 

 port of experiments conducted at the New Jersey Experiment Stations. The 

 records indicate clearly that in the field A. sollicitans lives and thrives in marsh 

 water of a higlier salinity than that which seems favorable to A, cantator. 



A mosquito collecting device, T. H. D. Griffitts (Jour. Amer. Med. Assoc, 

 67 (1916), No. 2, p. 117, fig. 1). — An apparatus combining the principles of the 

 fly trap for use in capturing mosquitoes is described and illustrated. It is 

 stated that of 80 specimens of Anopheles crucians, caught and retained in five 

 collecting tubes and placed under lantern globes closed with mosquito netting, 

 only one escaped in 24 hours. 



Mycetobia and the classification of the Diptera, F. Knab (Ent. News, 27 

 (1910), No. 6, pp. 239-262, figs. 2). 



Notes on some genera of Syrphidae with descriptions of new species, R. G. 

 Shannon (Proc. Ent. Soc. Wash., 18 (1916), No. 2, pp. 101-113). 



Synopses of Zodion and Myopa with notes on other Conopidae, N. Banks 

 (Ann. Ent. Soc. Amer., 9 (1916), No. 2, pp. 191-200). 



Description of two new tachinids, C. H. T. Townsend (Ent. News, 27 

 (1916), No. 5, p. 217). — Doryphorophaga abcrrans reared from the Colorado 

 potato beetle and from Blepharida rhois at Blacksburg, Va.; and Euphorocera 

 floridensis reared from Anticarsia getnmatilis at Gainesville, Fla., are de- 

 scribed as new to science. 



A tachinid parasite reared from an adult capsid, M. D. Leonard (Ent. 

 Neivs, 27 (1916), No. 5, p. 236).— The author records the rearing of Phorantha 

 occidentis from Miris dolobrata at Ithaca, N. Y. 



Rearing of Winthemia quadripustulata from rhynchophorous larva, H. L. 

 Parker (Ent. Neivs, 27 (1916), No. 5, p. 236).— The author records the rearing 

 of W. quadripustulata on January 7 from rhynchophorous larvje taken Decem- 

 ber 5 while following a plow in a sod field near Hagerstown, Md. 



New Tachinidae from North America, H. E. Smith (Proc. Ent. Soc. Wash., 

 18 (1916), No. 2, pp. 94-98). 



