1910] ECONOMIC ZOOLOGY ENTOMOLOGY. 859 



newly emerged larva of (;. IntostfciaMi tolled t.> penetrate the hair-bearing In- 

 tegument of the host, but poaltlve results were obtained when they were placed 



on portions of the buccal mucosa of a horse and calf recently killed, a larger 



anmber racoeeded in penetrating the populated port! I the calfe tonf 



compared with the unpaplllated. 

 "The three species are probably present In each of the western Province 



Canada. As regards their seasonal appearance, a. MesttnalU \- somewhat 

 later than a. nasaiis and a. kwntorrhoUtolii, which ap p e a r simultaneously and 



are OB the Wing for about the same time. (1. intrstinalU continues to be SCt 

 far into the autumn, of the three species, <;. fntettimalU causes the animal 

 less apprehension than the other two. 



"The provision of leather Haps on the lips of the horse, cut into strips, comb- 

 wise, Is advocated as likely to give good results in warding oil the attack of 

 C Iiainorrhoiilalin." 



A list of 14 references to the literature and illustrations of the three species 

 in color are included. 



An examination of the sense reactions of flies, (). ('. LoDOC (flat. I'.nt. /.'• 

 search, 9 (1918), No. 2, pp. Hl-151, pis. 3). — "Then- appears to he a general 

 similarity in the tastes of the different species witli regard to various chemicals 

 and foods; the tastes of ifusca domestlca and Phormia azurea, in many ei 

 being found to approximate most nearly. It will be interesting to discover 

 whether there is a closer correspondence between the sense organs of these Rlee 

 than between those of other species. 



"These experiments emphasize the extreme curiosity of house Hies, and again 

 show the catholicity of their tastes and the difficulty of finding any suhstai 

 which will either attract or repel all those that come near it. The mineral 

 and tar oils seem to be amongst the most repellent substances. With regard 

 to poisons, good results were obtained with sodium iodate, large numbers being 

 killed when very small amounts were used, although it did not always attract 

 many Hies. Sodium iodate has the disadvantage of being very expensive. But 

 further experiments require to be made before any definite conclusions can be 

 arrived at as to the importance of the iodates of sodium and other metals as 

 [toisons for general use. 



"House flies were not found to show any color preference. For house files 

 the optimum temperature was found to be between 36 and 44" < '. [9&8 and 

 111.2° B\], the maximum and minimum between ;"> and 58° and 10 to 13\ 

 respectively. 



"It appears that curiosity plays an important part in causing house tiles 

 to come to baits and to investigate traps, etc., although the senses of smell 

 and to a less extent that of sight are also concerned; the former, however, 

 to a much less extent than it Is with blow files, and it appears te be B 

 used when the flies are close to the baits." 



New muscoid genera, species, and synonymy. C. If. T. ToWHSSWD (fnesOM- 

 tor TnseUkB Menstmus, 6 (1918). Xos. 7-9, pp. t51-156; 10-19, pp. 1S1 /*.'>.— 

 Fifty-eight genera are erected and 37 species described as new. 



Two species of Pegomyia mining the leaves of dock. S \\ I soar {Jomr. 

 Agr. Research [U. S.], 16 (1919), No. 9, pp. 229 B*5, pis. 9, ri :! . 1). This li 

 report of studies at the New York Cornell Experiment Station of Mu- 

 ltistory and habits of two anthomylds (Pejomyis fihjpirata and /'. sjfois) 

 which extensively mine the leaves of h'unic.r CtitptU and /,'. obtmiifoUmM, 

 species of dock that occur commonly throughout the United states. 



Studies of P. caluptratn, which is by far the more common of the two. arc 

 reported upon at more length. It appear! that both species mine solely in 

 species of Ruuiex. 



