_Opsicostes personatus_, also known as _Reduvius personatus_, and which has been termed the "cannibal bug," is a European species introduced into this country at some unknown date, but possibly following close in the wake of the bedbug. In Europe this species haunts houses for the purpose of preying upon bedbugs. Riley, in his well-known article on Poisonous Insects, published in Wood's Reference Handbook of Medical Science, states that if a fly or another insect is offered to the cannibal bug it is first touched with the antennæ, a sudden spring follows, and at the same time the beak is thrust into the prey. The young specimens are covered with a glutinous substance, to which bits of dirt and dust adhere. They move deliberately, with a long pause between each step, the step being taken in a jerky manner. The distribution of the species, as given by Reuter in his Monograph of the Genus _Reduvius_, is Europe to the middle of Sweden, Caucasia, Asia Minor, Algeria, Madeira; North America, Canada, New York, Philadelphia, Indiana; Tasmania, Australia--from which it appears that the insect is already practically cosmopolitan, and in fact may almost be termed a household insect. The collections of the United States National Museum and of Messrs. Heidemann and Chittenden, of Washington, D. C., indicate the following localities for this species: Locust Hill, Va.; Washington, D. C.; Baltimore, Md.; Ithaca, N. Y.; Cleveland, Ohio; Keokuk, Iowa. [Illustration: CORISCUS SUBCOLEOPTRATUS: _a_, wingless form; _b_, winged form; _c_, proboscis. All twice natural size. (Original.)] The bite of this species is said to be very painful, more so than that of a bee, and to be followed by numbness (Lintner). One of the cases brought to the writer's attention this summer was that of a Swedish servant girl, in which the insect was caught, where the sting was upon the neck, and was followed by considerable swelling. Le Conte, in describing it under the synonymical name _Reduvius pungens_, gives Georgia as the locality, and makes the following statement: "This species is remarkable for the intense pain caused by its bite. I do not know whether it ever willingly plunges its rostrum into any person, but when caught or unskillfully handled it always stings. In this case the pain is almost equal to that of the bite of a snake, and the swelling and irritation which result from it will sometimes last for a week. In very weak and irritable constitutions it may even prove fatal."[4] [4] Proceedings of the Academy of Natural Sciences of Philadelphia, vol. vii, p. 404, 1854-'55.