A. sharp! new species. 



In general aspect almost an exact counterpart of semipunctatus. With males 

 in hand it is most readily distinguished from the latter by the absence of the 

 impressed curved striae of the third ventral segment. These striae need not be 

 confused with the fine scratches present on the ventral surface of most if not all 

 species of Agabus, the latter being notably finer, and on the third segment much 

 more transverse in direction. It may be further noted that in the present species 

 the tip of the tooth of the anterior protarsal claw in the male is less basal in 

 position, being not much more distant from the apex than from the base of the 

 claw. The side margin of the thorax is much broader than in semipunctatus and 

 often more or less rufescent, while the meshes of the elytral reticulation are dis- 

 tinctly larger. In the great majority of females the elytral sculpture does not 

 differ appreciably from that in the males, but in a few examples is much deeper 

 and the surface lustre comparatively dull. Length 6.7 to 7.1 mm. 



This is the species which Sharp interpreted as Kirby's semipunctatus, 

 and I have now before me a specimen from the Sharp collection 

 bearing this name label in his own hand. This specimen was collected 

 at Grimsby, Ontario by Pettit. All other examples seen by me including 

 the type, were taken at Winnipeg, Manitoba, by Mr. J. B. Wallis. 

 Type in my own collection. 



A. taeniolatus Harris, New Eng. Farm. VII, 1828, p. 164. 



This easily recognizable species seems to require no description. It shares with 

 disintegratus and lineellus the distinction of being the only gayly colored species 

 in our fauna. In color and markings of the upper surface it is almost identical 

 with disintegratus, but the dark elytral vittae are as a rule less distinctly green 

 bronzed and often heavier than in the latter. The tabular characters are at all 

 times sufficient for the separation of the two species, but it may be added that 

 the form in taeniolatus is a little more broadly oval, the meshes of the elytral 

 reticulation a little smaller and the minute elytral punctulation more evident, 

 this being virtually wanting in the female of disintegratus, and almost impercep- 

 tible in the male. Length 7.5 to 8 mm. 



Known to me from Massachusetts (Tyngsboro; Nantucket) to 

 Virginia (Fredericksburg). Hamilton records it from southwestern 

 Pennsylvania, and Dury from Cincinnati. 



A. disintegratus Cr. Trans. Am. Ent. Soc. IV, 1873, p. 416. 



Strikingly similar to taeniolatus, for a comparison with which see the tabular 

 characters and remarks under the latter species. Length 7 to 7.8 mm. 



A species of very wide distribution, occurring from Massachusetts 

 through Ontario, Canada, to Washington State (Trout Lake) and 

 Southern California (Pomona). It is rather common in New Jersey 

 and Pennsylvania and occurs as far south at least as North Carolina. 

 It is in the Iowa list and is known to me from Kentucky, St. Louis, 

 Missouri, El Paso, Texas, and New Mexico (Ft. Wingate). 



A. lineellus Lee. Proc. Acad. Nat. Sci. Phila. 1861, p. 340. 



Form broadly oval, prothorax typically entirely testaceous, but varying to piceous 



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