Jl6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



segment of antenna longer than third. Scutellum equilateral, with 

 commissure shorter than the scutellum. Hemelytra commonly 

 hyaline, not closely punctate all over. Orifices exteriorly 

 extended and produced into a tooth at apex (Tribe Ischnorhyn- 



chini) Ischnorhynchus 



2. Head with a curved longitudinal sulcus before each ocellus ; apical 

 angles of antenniferous tubercles prominent, acute; terminal seg- 

 ment of antenna shorter than third. Scutellum wider than long; 

 clavus widened posteriorly; commissure much longer than scutel- 

 lum. Hemelytra not hyaline, strongly and densely punctate all 

 over (Tribe Cymini) Cymus 



Ischnorhynchus Fieber. 



I. geminatus (Say). 



Het. New Harm., 14, 1832. 



The sparsely punctate hemelytra are much wider and longer 

 than the abdomen and vary from partially transparent to opaque ; 

 the apex of the corium reaches beyond the end of abdomen, and 

 the clear, transparent membrane extends for nearly half its length 

 beyond this part of the body. The rather closely punctate head, 

 pronotum and scutellum are reddish-fulvous. 



After considerable study and comparison of our species with 

 the European /. resedae Panzer, I am much in doubt as to 

 whether Say's species is distinct from this. Individuals vary much 

 in size and relative transparency of the corium. 



New Haven, 27 June, 1902 (E. J. S. M.), 21 Oct., 1903 (H. L. V.), 4 

 May, 1904 (H. L. V.) ; North Haven, 3 Aug., 1905 (H. L. V.) ; West 

 Haven, 27 June, 1905 (H. L. V.) ; Orange, 21 May, 191 1 (A. B. C.) ; 

 Rainbow, 9 May, 1912 (B. H. W.) ; Brookfield, 27 July, 1910 (E. L. D.) ; 

 Portland, 13 Aug., 1913 (B. H. W.), 1 June, 1915 (F. W. Haasis) ; New 

 Canaan, 17 Sept., 1918 (B. H. W.) ; North Branford, 5 July, 1921 (P. G.) ; 

 Greenwich, 18 Nov., 1920 (M P. Z.) ; Litchfield, 22 July, 1920 (M. P. Z.) ; 

 Cromwell, 30 Aug., 1920 (B. H. W.) ; Bridgeport, 20 Sept., 1920 

 (B. H. W.) ; Killingworth, 31 May, 1920 (B. H. W.). 



Cymus Hahn. 



Key to Species. 



1. Pronotum, at least anteriorly, provided with an elevated pale, longi- 



tudinal, calloused ridge. Second antennal segment scarcely 

 shorter than third. Head wider than long, basal segment of 



antenna extended about to apex of head 2 



Pronotum without a distinct median longitudinal calloused ridge. 

 Second segment of antenna much shorter than third. Head about 

 as long as wide; basal segment of antenna not reaching to apex 

 of head angustatus 



2. Apical segment of antenna scarcely shorter than third. Width of 



anterior margin of pronotum subequal to inter-ocular part of head 

 Size smaller, 3-3.5 mm discors 



Apical segment of antenna very evidently shorter than third. 



Anterior margin of pronotum wider than inter-ocular space. Size # 

 larger, 5 mm. long luridus 



