335 



FA3IILY HYGROMETRID.E'. 



Hygrotrechus, Stal. 

 1. H. remigis. 



Geiris remigis, Say, Heteropt. ]S^e^Y Harmouy, 35, No. 1. 



Inhabits Tesas, Arizona, Colorado, and the Atlantic region. 

 Lieutenant Carpenter collected specimens in the mountains of Col- 

 orado in July. 



3. S. rohustus. 



Hi/f/rotrechus rohustus, Uliler, iu Packard's Insects luhabiting Salt- Water, Silli- 

 man's Journal, 1S7J, i, 105. 



Inhabits Clear Lake, California. 



It is of much interest to know whether the pale colors of this and of 

 the other Hemiptera of salt-lakes are caused by the presence of alkaline 

 substances in the waters; oi', have only immature specimens been met 

 with by those who have collected there? 



LiMNOPORUS, Stal. 

 L. rnfoscutellatus. 



Limnoporus rufoscutellatus, Lat., Genera et Sp. Ins. iii, 134, 2. 



Mountains of Colorado, Jul}^, Lieutenant Carpenter. 



From the numerous specimens which I have examined, this species 

 seems to be common in Colorado. In that region, it attains to full 

 proportions, and puts on its clearest russet-brown coat. It is quite 

 common on still waters in early summer in Eastern Massachusetts. 

 But near Baltimore I have met with it only twice — in early spring, 

 and then only in the most dwarfed specimens that I have ever seen. 

 The wide distribution of these insects may be brought about by the 

 agency of birds and reptiles. The cranes and wild ducks frequent 

 occasionally the pools iu the fresh-water marshes where these insects 

 live, and on the eastern side of our continent it is within the limits 

 of the range of these birds that this species has been found most 

 frequently. Our toads and frogs cram themselves with insects of the 

 water and marsh, and to the rough backs and flanks of these creatures 

 the ova and young of our water-skimmers might readily adhere, and 

 be transported to a considerable distance from their original habitat. 



Family PELOGONIDiE. 



PELoaoNUS, Latr. 

 P. americanus. New sp. 



Broadly oval, slaty-blackish, opaque, the pronotum a little narrower 

 than the abdomen. Head polished, minutely punctured in part, invested 

 with very sparse silvery prostrate pubescence, which is more dense be- 

 neath ; rostrum reaching the end of the second ventral segment, black- 

 ish-j)iceous on the swelled base, the remainder pale rufo-testaceous; 

 antenufe pale piceous ; face obsoletely carinate, each side with a series 

 of oblique wrinkles, its anterior and lateral boundaries carinated. Pro- 

 notum transverse, velvety blackish, with a few short wavy lines and 

 some dots of bluish lead-color, and remotely golden pubescent ; the 

 lateral margins slightly oblique, only a little narrowing anteriorly, and 

 rounding against the anterior angles, which are distinct and almost 



