BUFFALO SOCIETY OF NATURAI, SCIENCES 489 



Described from two male and three female examples taken 

 by me at Manitou and Fort Collins, Colorado, in July 1900. 

 This pretty species stands in the collection of the Agricultural 

 College at Fort Collins as Polymerus rubidus Uhler, but I can- 

 not find that the species was ever published. 



Diaphnidia pellucida Uhler. 



Of this species, which seems to be common throughout the 

 Eastern United States and Canada, I have material from New 

 York, Ohio, Massachusetts, District of Columbia, Colorado and 

 California. With me it most frequently occurs on hickory trees 

 and has a most annoying habit of biting sharply should it land 

 where the skin is wet with perspiration. It seems to do this 

 for sustenance and not for protection. 



I have not yet been able to locate Diaplmidia debilis which 

 would seem to be a little larger and paler than the present 

 species. 



Diaphnidia provancheri Burque. 



This species, which was described as a Malacocoris on page 

 144 of Provancher's Petite Faune Ent. du Canada, Hemipteres, 

 is very close to pellucida, but may readily be distinguished by 

 its having the second antennal joint longer and blackish. I have 

 taken it at Hamburg. Boston and Gowanda in Erie Co., N. Y, ; 

 Mr. W. J. Palmer obtained it at Quinze Lake, Quebec, and 

 Prof. A. P. Morse has taken it at Alstead, N. H., all in August 

 and September. 



Diaphnidia hamata n. sp. 



Closely allied to pellucida but more slender and marked 

 with a cloud on the disk of the corium and another in the 

 middle of the membrane ; the membranal veins forming a double 

 fuscous hook. Length scant 4 mm. to the tip of the membrane. 



Head nearly as in pellucida, the vertex a .little more convex and the 

 longitudinal sulcus and basal depression nearly obsolete in the male, quite 

 so in the female. Pronotum proportionately longer and narrower anteriorly, 

 the callousities prominent; seutellum and elytra narrower than in the allied 

 species as is the whole insect. Rostrum reaching to just beyond the pos- 

 terior coxae. First joint of the antennae as long as the head, second as 

 long as the apical two together. 



Color in dried specimens pale yellowish green, the head, antennas and 

 pectus more fulvo-testaceous, the apical antennal joint slightly infuscated. 

 Elytra pale greenish-pellucid, more deeply colored along the claval and 



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