1917] ECONOMIC ZOOLOGY — ENTOMOLOGY. 763 



described since the appearance of volume 3, there is a total of 398 described 

 species from the region included in this work. 



In the tribe Sabethini (pp. 19-187 of vol. 3) 8 genera and 85 species are 

 recognized, including Sabethes, represented by 3 species ; Sabethinus, 2 species ; 

 Sabethoides, 1 species; Limatus, 3 species; Wyeomyia, 65 species (4 new to 

 science) ; Prosopolepis, 1 species; Lesticocampa, 5 species (2 new) ; and Joblo- 

 tia, 3 species. In the tribe Culicini (pp. 189-523 of vol. 3 and pp. 525-1038 of 

 vol. 4) 17 genera and 297 species are treated, including Dinomimetes, repre- 

 sented by 1 species ; Deinocerites, 5 species ; Dinanamesus, 1 species ; Culex, 104 

 species (6 new) ; CarroUia, 2 species; Lutzia, 2 species (1 new) ; Culiseta, 6 

 species; Mansouia, 7 species; Psorophora, 29 species; Aedes, 83 species (5 

 new) ; Htemagogus, 4 species; Orthopodomyia, 5 .species; Aedeomyia, 1 species; 

 Uranotaenia, 11 species (1 new) ; Megarhinus, 11 species; Anopheles, 21 species 

 (1 new) ; and Ckelodiazesis, 1 species. 



Under each species are given the synonymy with references to the literature ; 

 copies of the original description and the original descriptions of the synonyms ; 

 detailed descriptions of the male, female, and larva, when known ; distribution, 

 including a full citation of localities, date, and collector ; and what is known of 

 the life history and habits. 



It is pointed out that only a few parts of the region have been at all ade- 

 quately explored, many large areas not at all, so that many more species doubt- 

 less wait discovery. A large proportion of the material studied consists of bred 

 specimens with larvae associated. Sixteen pages are devoted to the yellow- 

 fever mosquito, for which the name Aedes calopus is used, though, as shown in 

 a foot-note, the strict application of the rule of priority will necessitate the 

 use of the name A. argenteus (Poiret). 



Errors noted in the preceding volumes are corrected in an appendix (pp. 

 1039-1042) to which are added a few supplementary notes. 



The relation between the hatching of the eg'g's and the development of the 

 larvae of Steg-omyia fasciata (Aedes calopus) and the presence of bacteria 

 and yeasts, E. E. Atkin and A. Bacot {Parasitology, 9 {1917), No. 4, pp. 4S3- 

 5S6). — The authors ficd that the larvse of S. fasciata greedily consume both 

 bacteria and yeasts, on which they can thrive in the absence of any other food, 

 whereas in very many instances they fail entirely to develop on a variety of 

 nutritive fluids and particles, including dead bacteria, under sterile conditions. 

 The rearing of adults under sterile conditions is so exceptional that they feel 

 justified in concluding that the presence of bacteria or yeast is a practical 

 necessity for the maintaining of the species. 



On the biology and economic significance of Tipula paludosa, J. Rennie 

 {Ann. Appl. Biol., 2 {1916), No. ^, pp. 235-240, pi. 1; 3 {1917), No. 2-S, pp. 116- 

 1S7, pis. S, figs. S). — The first part of this paper consists of a preliminary report 

 of observations; the second part deals with hatching, growth, and habits of 

 the larva. 



Notes on New England Tachinidse, with the description of one new genus 

 and two new species, H. E. Smith {Psyche, 24 {1917), No. 2, pp. 54-58). — 

 Pseudotachinomyia webbcri n. g. and n. sp. and Sciasma frontalis n. sp. from 

 Massachusetts are described. 



The larvse of Pelatachina pellucida, which emerged from the larv£e of 

 Evvanessa antiopa during August, hibernated in the puparia. From 344 of 

 the lepidopterous larvse 214 puparia were obtained, but since superparasitism 

 existed to a great extent in the host larvse, the figures do not indicate the 

 exact percentage of parasitism. This is thought to be the first record of a 

 species of the genus having been reared in North America, although the rearing 

 of the genotype, P. tibialis from Vanessa urticee in Europe has been recorded. 



