1920] ECONOMIC ZOOLOGY — ENTOMOLOGY. 857 



ficient to give 0.000581 gm. to each gram of sirup. The examlnatlcm of dead 

 bees to determine the presence of arsenic was made by the Gutzeit method, 

 which appears to be sensitive enougb for mo.st do.ses that kill bees, although it 

 is believed that some very small fatal doses may escape detection. 



"A very small amount of arsenic (less than 0.0000005 gm. As-jOs) is a fatal 

 dose for a bee. The time re(iuirod to kill the bee with arsenic depends upon the 

 size of the dose. Some expire within one and one-half hours from the time of 

 administration of the poison, others linger on for a period of five or six hours, 

 most of those observed to die from a dose gathered in the field did so within 

 three hours. Bees work freely on sprayed trees in the open, even when there are 

 unsprayed trees all about. The mortality in the check cage was 19 per cent, 

 as compared with 69 per cent in the lime-sulphur-arsenate of lead sprayed cage, 

 and 49 per cent in the sulphur-arsenate of lead dusted cage. For the sake of 

 the bee, fruit trees should not he sprayed while in full bloom." 



Fertilization in the honeybee, G. H. Bishop (Jour. Expt. Zool., SI {1920), 

 No. 2, pp. 225-286, figs. 6). — The first pai't of this account deals with the male 

 sexual organs, their histological structure, and physiological functioning (pp. 

 225-260) ; the second part with the disposal of the sexual fluids in the organs 

 of the fenmle (pp. 267-280). 



Three new species of Indian drynnid parasites of rice leaf hoppers, S. A. 

 RoHWEE (Proc. U. S. Natl. Mas., 57 {1920), pp. 159-161, pi. 1) .—Digonatopus 

 lucidiis, reared from a nymph of the jassid rice leaf hopper {Nephotettix bi- 

 punctatus Fab.) at Pusa ; Uaplogonatopus orientalis, reared from Sogata species 

 on rice at Bilaspur ; and Pseudogonatopus sogatea, reared from Sogata species 

 on rice at Pusa. are described as new. 



The North American ichneumon flies of the tribes Lycorini, Polysphinc- 

 tini, and Theroniini, R. A. Cushman {Proc. U. S. Natl. Mus., 58 {1920), pp. 

 7-48, pi. 1, figs. 5). — Two genera and eight species are described as new. 



The North American ichneumon flies of the tribes Labenini, Rhyssini, 

 Xoridini, Odontomerini, and Phyt()dietini, S. A. Rohweib {Proc. U. S. Natl. 

 Mus., 57 {1920). pp. 405-47 Jf, figs. 13). — Among the species here described as 

 new that are of economic importance are Labena confusa reared as a parasite 

 of Thrincopyge alacris in Texas and from Chion cinctus at Mount Vernon, Va. ; 

 and L. confusa minor, reared from Chrysobothris femorata in Washington, 

 D. C. The genera Labenidea and Rhyssella are erected. A host catalogue and 

 index are included. 



Descriptions of twenty-five new species of North American Hymenop- 

 tera, S. A. Kohwer {Proc. U. S. Natl. Mus., 57 {1920), pp. 209-2S1). —Amon^ 

 the .species of economic importance here described as new are species of Ten- 

 thredinidae and the parasites Lissonota evetrice, parasitic in the cocoons of 

 Evetria taxifvliclla in the Cheyenne Mountains, Colo., and Ashlaud, Oreg. ; 

 L. diroyctriw. a parasite of Dioryctriu xunthcenobares at Patricks Creek, Calif.; 

 L. conocola, parasitic on insects living in the cones of Abies shastensis at Min- 

 eral King, Calif.; Exochus {Triclistus) evetriw, reared as a parasite of the 

 pupae of E. taxifolicUa and E. siskiyouana at Butte Falls, Grant Pass, and 

 Ashland, Oreg. ; Mesoleius gymnonychi, parasitic on Gynmonychus californicus 

 Marl., at Wenatchee, Wash. ; Excnterus affinis, reared from a cocoon of Neodi- 

 prion sp. feeding on Pinus resinosa in Maine ; and Microtypus dioryctriw, a 

 parasite of /). xantlmnobdres at Patricks Creek, Calif. 



Notes and descriptions of species of Telenomus having ten-jointed an- 

 tennae (Hymenoptera; Scelionidaj) , A. M. Wilcox {Psyche, 27 {1920), No. 

 4, pp. 78-81). — Notes are cited on four species of this genus, of which two, 

 T. hemerocampoB reared from eggs of Hemerocampa leucostigma Abb. & Sm. 



