306 On Aquatic Carnivorous Coleoptera or DytiscidoB. 



383. Hydroporus hydropicus, Lee, M.C. — Brevis, convexus, sat latus, sine 

 pubescentia, ferrugineus, prothorace basi apiceque elytrisque fuscis, his signaturis 

 vagis pallidioribus ; elytris dense fortiter insequaliter punctatis ; corpore subtus 

 dense fortiterque punctato. Long. 3, lat. 2 m.m. 



This species is very Uke Dytiscus in^quahs, (No. 381), but the punctuation of the 

 elytra is denser and more uneven, consisting on the basal portion of coarse and 

 fine punctures mixed together ; the species is however readily distinguished by the 

 dilated tarsi of the male. The female I have not seen; according to Crotch it is 

 opaque. 



California, (San Diego'*. 177. 



384. Hydroporus farctus, Lee, M.C. — Subrotundatus, convexus, opacus, sine 

 pubescentia, ferrugineus ; prothorace dense subtilissime punctato ; elytris dense 

 subtiliter reticulatis, punctis adspersis parvis ; pectore dense sat subtiliter rugoso- 

 punctato ; abdomine baud punctato sed alutaceo, opaco. Long. 28, lat. li m.m. 



I have seen of this species only a typical individual transmitted to me by Leconte, 

 and which has lost its head ; according to Crotch the clypeus is not margined, the 

 species may be easily recognized by its rotund form and peculiar sculpture. The 

 individual I have examined has the front and middle tarsi, short and rather broad, 

 but I am in doubt as to its sex. 



North America, (^Massachusetts, New Jersey). 179. 



385. Coelambus discedens, n. sp. — Ovalis, convexus, nitidus, subtilissime pubescens, 

 brunneo-ferrugineus, prothoracis marginibus elytrisque signaturis vagis pallidioribus ; 

 elytris crebre fortiter punctatis, punctis ad apicem obsoletis ; pectore abdominisque 

 lateribus basi grosse punctatis. Long. 3i, lat. 2 m.m. 



Antennae slender and elongate. Thorax rather sparingly punctured about the 

 middle, but more closely at the margins. Elytra at the shoulders and base with 

 a large irregular pale mark and another near the extremity ; their punctuation is 

 rather coarse and not dense, at the apex the punctures are nearly Avanting ; the 

 elytra bear a sparing, very fine pubescence. The sternum and coxae and the sides 

 of the abdomen at the base with excessively coarse deep j^unctures. 



The only individual I have seen, has the three basal joints of the front tarsi 

 elongate, but scarcely or not at all dilated ; I am in doubt as to its sex. I am not 

 sure that it is rightly placed in Ccelambus. 



China, (Kiu Kiang, found by Mr. Giorge Lewis). 180. 



