NATURAL SCIENCES OF PHILADELPHIA. 365 



SELENOPHORUS Dej. 



S. subtinctus, elongato-oblongus, niger nitidus, thorace capite parum 

 latiore latitudine breviore, postice angustato, angulis posticis obtusis baud 

 rotundatis, margine laterali piceo, ad basin utrinque vage impresso, punctu- 

 lato ; elytris iridescentibus, thorace paulo latioribus, striis profundis, ad 

 apicem magis exaratis, 2da punctis 6 8 parvis impressis, 5ta punctis 3 vel 4 

 parvis parum distinctis, autennis palpis pedibusque testaceis. Long. 6-5 mm. 



Louisiana ; one specimen given me by Mr. Ulke. Allied to S. iricolor, 

 but smaller and narrower, with the hind angles of the thorax not at all 

 rounded, and the base each side strongly punctulate. 



HYDROPORUS Latr. 



H. obesus, rotundatus convexus, postice acutus, subtiliter reticulatus, 

 parce subtiliter punctulatus, piceus, capite, thoracis lateribus, elytrorum fas- 

 ciis et lineolis pedibusque pallidis ; epistomate baud marginato, occipite ob- 

 scuro, thorace utrinque linea arcuata ad basin extensa impresso, elytris utrin- 

 que subtiliter biseriatim punctatis ; antennis extrorsum, tarsisque piceis. 

 Long. 3 mm. 



One male, California, Mr. Ulke. Of the same size and form as H. punc- 

 tatus and cuspidatus, but rather more obtuse in front, and very distinct 

 by the epistoma not being margined in front, and by the thorax each side being 

 marked with a deep curved line, concave inwards, extending from the middle 

 to the base. This line is twice as distant from the middle as from the side, and 

 meets the base at an obtuse angle. The pale markings of the elytra consist of 

 a basal band, another behind the middle, and an apical spot ; the bands are 

 composed of short lines more or less confluent, and are dilated at the margin 

 into larger spots ; the epipleuras are testaceous ; the usual lines are composed 

 of small crowded punctures, the surface is finely reticulate, and towards the 

 suture small sparsely scattered punctures are visible, which become obsolete 

 towards the sides. 



H. 12-lineatus Lee. and H. scitulus Zee. are the only other species 

 in my collection having the thorax similarly impressed, but the lines in them 

 are less acutely defined, and the body is not rounded. 



H. vitiosus Lee. A male specimen from Texas, sent me by Mr. Salle, 

 agrees in form and arrangement of colors with the female type from Illinois, 

 but differs by the punctuation, which is quite strong, and not dense, nearly as 

 in the male of H. oppositus. The agreement in other respects is so com- 

 plete that I would not be justified in regarding it as belonging to a different 

 species. 



H. sellatus, ovalis convexus, modice elongatus, nitidus, subglaber, ca- 

 pite nigro-piceo subtiliter baud dense punctato, ore maculaque occipitali tes- 

 taceis, thorace testaceo, apice infuscato, basi late piceo, profunde punctato, 

 lateribus obliquis rectis, cum elytris (lateraliter visis) angulum valde obtusum 

 formantibus ; elytris pallidis, profunde sat dense punctatis, punctis majoribus 

 versus suturam et in vitta dorsali parum distincta digestis, sutura, lineolis pau- 

 cis, plagaque postica irregulari subsuturali maxima nigris ; subtus niger, rude 

 punctatus, pedibus testaceis, antennarum apice femoribusque infuscatis. Long. 

 35 mm. 



One specimen from Dacota, given me by Mr. Ulke. This species has the 

 same size and nearly the same form and sculpture as H. s u t u r a 1 i s Lee, but 

 is more equally attenuated in front and behind, and the punctures of the elytra 

 are somewhat finer and more dense ; the pale yellow elytra, with the large black 

 posterior spot, will enable it to be easily recognized. The spot extends from 

 before the middle to within a short distance of the tip, and from the suture 

 three-fourths way to the sides ; the anterior outline is formed by the confluence 

 of two short lines, and the exterior outline is lobed ; the whole suture is black- 



186(5.] 



