anterior tarsi of the male are distinctly incrassate, the glandular hairs beneath 

 bearing minute palettes ; the anterior protarsal claw is peculiarly toothed beneath, 

 the proximal side of the tooth being parallel to, and the distal side perpendicular 

 to the axis of the claw, the apex of the tooth either rectangular or a little acute, 

 and about twice as distant from the base of the claw as from the tip. The pros- 

 ternal process is more narrowly (subangularly) convex than in any of the pre- 

 ceding species. Length 5.8 to 6.5 mm. 



A species of northern distribution ranging from New England to 

 Manitoba and perhaps even further west. Specimens submitted by 

 Mr. Frost bear the label "Saskatchawan?" 



This and the next are our smallest species of Agabus. The present 

 species is completely defined by its size, color, and the peculiar form 

 of the anterior protarsal claw of the male. It is closely allied to the 

 following species, which has hitherto ben confused with it. 



A. oblongulus new species. 



Very closely allied to punctulatus, the color similarly aeneopiceous with paler 

 margins, the elytra varying to entirely obscure brownish yellow ; sculpture nearly 

 identical, the females similarly opaque ; form perceptibly more oblong, especially 

 when series are compared; tooth of anterior protarsal claw of male acute and 

 more nearly median in position. Length 5.5 to 6.3 mm. 



The type in the writer's collection is a male from Corvallis, Oregon. 

 I have also examples from Port Townsend, Washington, and have 

 seen specimens from Spokane Falls, Washington (Wickham collection.) 



A. semipunctatus Kby. Fauna Bor. Amer., Ins. 1837, p. 69. 



stridulator Shp. On Dytiscidae, p. 509. 



Moderately elongate, oblong oval; black, antennae rufous, legs dark rufous the 

 femora and sometimes the tibiae darker. Surface moderately shining, without 

 aeneous lustre; dorsal series of punctures of elytra conspicuous, confused; reticu- 

 lation fine, irregular; minute punctures sparse, sometimes within the areolae, 

 sometimes at their intersections. Side margins of prothorax narrow. Third 

 ventral of male with several subparallel rather deep curved striae each side of the 

 middle. Pro- and mesotarsi of male a little incrassate, anterior protarsal claw 

 with an acute subbasal tooth. Length 5.5 to 6.7 mm. 



A common species, occurring over a large part of British America 

 (Newfoundland; Hudson Bay region; Manitoba; Alberta; Ottawa, 

 Ontario) and through the northern United States from New England 

 to Illinois (White Mts., New Hampshire ; Tyngsboro, Mass. ; Peekskill, 

 New York; Arlington, New Jersey). 



Kirby described from a unique female specimen, localitv not stated. 

 At my suggestion Mr. Arrow has kindly compared this type \vith 

 the type series of stridulator Shp., 'and does not hesitate to pronounce 

 them identical. For some unaccountable reason Sharp seems never 

 to have examined Kirby's types though their presence in the British 

 Museum would appear to make them easily accessible to him. 



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