June, 1913] Roberts: Notes on Haliplid^ of America. 95 



to see the metasternum and, being an unique, I have not the temerity to 

 remount it. 



One specimen, a female, from San Mateo Co., California — 

 " Baker." 



Type from, and deposited in, the collection of the U. S. National 

 Museum, Washington, D. C. This is a very interesting species, 

 which would scarcely be taken for a Brychius at first glance, its form 

 reminding one very much of a small Berosus, especially when viewed 

 from the side. 



Haliplus connexus Matheson. 



Mr. Matheson has very well separated this species from its near- 

 est ally, fasciatiis Aube. 



In addition to the characters mentioned by him I may add that in 

 connexus the mid-metasternum is more broadly impressed each side, 

 almost lobed, and the margin is inore abbreviated, not reaching the 

 suture of the antecoxal piece, as is the case in fasciatus. The punc- 

 tuation is more shallow throughout, especially so on the coxal plates. 



The males have the front and middle tarsi more slender, the joints 

 shorter and proportionately more pedunculate. 



Both species have the apex of pronotum finely margined each side, 

 obsolete at middle. This margined apex separates the two species 

 from the triopsis group as well as the absence of any anterior black 

 spot. 



Haliplus punctatus Aube. 



From the specimens so named I have seen in collections there 

 seems to be a misconception as to what this very distinct species is. 

 I may, therefore, be pardoned for giving a translation of Mr. Aube's 

 French description, as follows : 



"Length 3^-4. Breadth 2 >i mm. 



" Oval, rounded, convex, slightly depressed about the shield and ferru- 

 ginous. Head quite strongly punctured, antennae and palpi testaceous. 



" Thorax ferruginous, with a round black spot at the middle of the front 

 margin : one and one half times as wide as long, strongly emarginate in front 

 where it is narrower, sinuate at base the sides of which are slightly oblique, 

 the middle of the base prolonged in a point upon the elytra : sides rectilinear 

 and oblique, front angles acute and strongly diminished, hind angles almost 

 right angles. 



"Thorax covered with large, deep punctures except the center of the disc 

 which is smooth within a small limit. 



