ENTOMOLOGY

COMMON FLIES AND HOW TO TELL THEM APART 151cata. However, these slits are not directed toward those of the oppositeplate but are sub-parallel to them. The stigmal field is strongly depressedto form a deep pit, and the stigmal plates are at the bottom of this pit.The segments of the body bear complete rings of spinose areas, and oftensupplementary pads on the sides.Sarcophaga larvre prefer animal matter, breeding extensively in carcasses.They have been found in cheese, oleomargarine, pickled herring,dead insects, and human feces. A species was also reared from decayingvegetables.BIBLIOGRAPHYBanks, N., 191~.-The Structure of Certain Dipterous Larvre with P~rticularReference _to those in Human Foods. U. S. Dept. Agr., Bur.Ent., Tech. Bull. ~~.Hewitt, C. G., 19l0.-The Structure, Development and Bionomics of theHouse Fly, j}/usca domestica Linn.Howard, L. 0., 1910.-A Contribution to the Study of the Insect Faunaof Human Excrement. Proc. Wash. Acad. Sci., vol. ~, pp. 541-604.Howard, L. 0., and ;U:utchison, R. H., 1915.-House Flies. U. S. Dept.Agr., Farmers' Bull. 679.Howard, L 0., and Hutchison, R. H., 1917.-The House Fly. U. S.Dept. Agr., Farmers' Bull. 851.Lallier, P., l897.-Etude sur la Myase du Tube Digestif chez l'Homme.These Faculte de Medecine de Paris, pp. 1~0, 1 pI.Lintner, J. A., 188~.-Injurious Dipterous Insects. 1st Rept. Inj.Ins., New York, pp. 168-~~7, figs. 45-67. (Anthomyiidre.)Lowne, B. T., 189~, 1895.-The Anatomy, Physiology, Morphology,and Development of the Blow-fly (Calliphora erythrocephala). ~voIs., London, 778 pp. 5~ pIs., 108 figs.'\' L'wstclld, R., 1907.-Preliminary Rcport on the Habits, Life-cycle, andBreeding Places of the Common House Fly (Musca domestica), asObserved in the City of Liverpool, with Suggestions as to the BestMeans of Checking Its Increase. Liverpool, ~3 pp., 14 figs.Packard, A. S., 1874.-0n the Transformation· of the Common HouseFly, with Notes on Allied Forms. Proc. Bost. Soc. Nat. Hist., vol. 16,pp. 136-150, 1 pI.Patton, W. S., and Cragg, F. W., 1913.-A Textbook of MedicalEntomology.Perez, C., 1910.--Recherches Histologiques sur la Metamorphose desMuscides (Calliphora erythrocephala). Arch. ZooI. Exp., ~74 pp.,16 pIs. ' .