ECONOMIC ZOOLOGY ENTOMOLOGY. 755 



Mosquitoes of Minnesota, K. Taylor {St. Paul Med. Jour., 12 {1910), No. 7, 

 pp. 329-S35). — The author presents a list of 12 species, representing 6 genera, 

 which were found near St. Paul and Minneapolis and in other parts of the 

 State. 



Malaria and anophelines in the valley of the Clear River, at Tuyen-quang 

 and Hagiang-, C. Mathis and M. Leger {Bui. 8oc. Path. Exot., 3 {1910), No. 

 'J, pp. 632-636). — The authors have determined the presence of 13 species of 

 anopheline mosquitoes in the vicinity of the Clear River, among which are 

 Myzomia christophersi, Mysorhynchus 'barMrostris, Nyssorhynclius fuliginosus 

 and N. stephensi, species known to transmit the malarial parasite. It is said 

 that in the Tonkin delta where malaria occurs much less frequently Myzomyia 

 rossi and Mysorhynchus sincnsis-pseudopictus, which do not convey malarial 

 infection, are the principal species. 



Note on an acid-resistant parasite of the larvae of Stegomyia fasciata, 

 J. Legendre {Compt. Rend. Soc. Biol. [Paris], 69 {1910), No. 21, pp. 19 Jt- 

 196). — Under the name BacilUis acidophilus stegomyice, the author describes 

 an acid-resistant form that he has observed while rearing the yellow fever mos- 

 quito. Although occurring but rarely in water in the aquarium, sections made 

 of larvse and pupse have shown the alimentary canal to be filled throughout 

 its entire length with this acid-resistant bacillus. The development of the 

 mosquito, however, does not appear to be retarded thereby. 



Studies in relation to malaria, S. T. Darling {Washington: Isthmian 

 Canal Coin,, 1910, pp. 38). — These biological studies of mosquitoes and their 

 relation to the transmission of malaria have been previously noted from another 

 source (E. S. R., 23, p. 561). 



Studies upon leprosy. — IX, Mosquitoes in relation to the transmission of 

 leprosy, D. H. Currie {Puh. Health and Mar. Hosp. Serv. U. 8., Pub. Health 

 Bui. 39 pp. 3-19). — The author concludes that "mosquitoes feeding, under 

 natural conditions, upon cases of nodular leprosy so rarely, if every, imbibe the 

 lepra bacillus that we can exclude them as one of the ordinary means of 

 transference of this bacillus from lepers to the skin of healthy persons. This 

 insect is therefore not of epidemiological importance in this disease." 



" The reason that mosquitoes that have fed on lepers do not contain the 

 lepra bacilli is that when these insects feed they insert their proboscis directly 

 into a blood vessel and thus obtain bacilli-free blood, unmixed with lymph. 

 The above-mentioned habit alone accounts for the absence of lepra bacilli in 

 mosquitoes that have fed on lepers; the insect neither avoids biting a leprous 

 nodule nor is its digestive tract or the contained fluids capable of altering the 

 morphology of this bacillus in a reasonable length of time." 



A bibliography of 29 titles relating to the subject is appended. 



A remedy for the black fly pest in certain streams of the southern penin- 

 sula of Michigan, Cora D. Reeves {Rpt. Mich. Acad. Sd., 12 {1910), pp. 77, 

 78). — Observations made of Si/mulium venvstimi, which was a great pest at 

 Douglas Lake, Cheboygan County, Mich., in June, 1909, are recorded. Experi- 

 ments conducted by the author indicate that the removal from the stream of 

 smooth objects to which the larvse are attached will greatly lessen the black 

 fly pest. 



Some observations on the bionomics of Tabanus ditseniatus and T. kingi, 

 H. H. King {Bvl. Ent. Research, 1 {1911), No. //, pp. 265-21 1^, figs. 7).— A re- 

 port of investigations conducted at the Wellcome Tropical Research Labora- 

 tories at Khartum. 



[Flies], C. W. Stiles {Puh. Health and Mar. Hosp. Serv. U. S., Pub. Health 

 Rpts., 25 {1910), No. 50, pp. 1829, 1830).—" If fly-blown fecal material is buried 

 under 17 in. of sterilized sand, flies {Ophrya leucostoma) will crawl through 



