. Bulletin - State Geological and Natural History Survey of Connecticut. Geology; Zoology; Botany; Natural history. No. 34-] HEMIPTERA OF CONNECTICUT I GERRIDAE. 66l 2. Antero-lateral margin of pronotum with a lighter stripe 3 Antero-lateral margin of pronotum concolorous; second emargina- tion of sixth abdominal segment in male, narrow and rounded; female genital segment comparatively narrow; connexivum flavous marginatus 3, Second emargination of sixth abdominal segment in male broadly rectangular; bases of hemelytra dark buenoi Second emargination of sixth abdominal segment in male narrow,
. Bulletin - State Geological and Natural History Survey of Connecticut. Geology; Zoology; Botany; Natural history. No. 34-] HEMIPTERA OF CONNECTICUT I GERRIDAE. 66l 2. Antero-lateral margin of pronotum with a lighter stripe 3 Antero-lateral margin of pronotum concolorous; second emargina- tion of sixth abdominal segment in male, narrow and rounded; female genital segment comparatively narrow; connexivum flavous marginatus 3, Second emargination of sixth abdominal segment in male broadly rectangular; bases of hemelytra dark buenoi Second emargination of sixth abdominal segment in male narrow, semicircular; bases of hemelytra white-marked argenticollis G. (Gems) marginatus Say. (PI. xvi, 11.) Het. New Harm., 36, 1832; Compl. Writings, i, 362, 1859. This small stout form is an abundant inhabitant of our lakes and ponds, where it preys on other insects. This, too, has five nymphal stages and a life cycle of from five to six weeks. It ranges over the whole United States, and in Connecticut has been taken as' follows: West Stratford, 16 Aug., 1904; Putnam, 12 July, 1905 (H. L. V.) ; Orange, 13 Apr., Hamden, 24 Apr., 28 May, Cheshire, 6 May, New Haven, 4 May, 1911 (B. H. W.) ; Lyme, 14 May, 1911 (A. B. C.) ; So. Meriden, 26 Apr., 1914 (H. L. J.). G. (Gerris) buenoi Kirkaldy. (Figs. 150 and 151.) Ent. News, xxii, 246, 1911. This small species, shown in figures 150 and 151, has frequently been confounded with the preceding. It ranges from British Columbia as far as New Jersey at least. In Connecticut it is recorded as follows: Milford, 10 Aug., 1905 (W. E. B.) ; New Haven, 14 Apr., 4 May, 1911; Cheshire, 6 May, 1911 (B. H. W.) ; Hamden, 18 May, 1919 (M. P. Z.) ; Litchfield, 26 July, 1901 (L. B. W.).. Fig. 151. Gerris buenoi Kirkaldy,— (a) lateral view of head, (b) male genitalia, (c) female genitalia. All greatly enlarged. Drawing by Dr. Philip Garman. G. (Gerris) argenticollis Parshley. Ent. News, xxvii, 103, 1916. This Species is recorded by the author from Massachusett
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