On Aquatic Carnivorous Colcoptera or DytisciJce. 559 



supra subopacus, densius reticulatus ; elytris guttulis duabus pallidis, ad apicem 

 parum siiniato acuminatis ; coxis posterioribus evidenter reticulatis, maro-ine 

 anterioie externe parum curvato. Long. lOi, lat. G ni.m. 



This species is excessively similar to Dytiscus obscurus (No. 7S2), but the male 

 claws are slightly different ; on its hind feet the outer claw is more slender and 

 rather longer, and has a minute deflexed sharp extremity ; while on the front feet 

 the anterior claw is a little thickened near the base, and appears scarcely sinuate 

 beneath, and the posterior claws are without the minute projection in the middle of 

 its hind margin : the apical ventral segment is deeply rugose on each side : the 

 female is very difficult to distinguish from D. obscurus, but the apex of the elytra 

 is less sinuate, and the reticulation there is not quite so obsolete. 



Europe, (Sweden; France, Limoges; Germaiij'). 9:^8. 



799. Ilybius laramaeus, Lee, M.C. — Ovalis, angustulus, baud brevis, sat convexus, 

 subtus piceus, supra nigro-seneus, limbo anterius ferrugineo, antennis pedibusque 

 anterioribus rufis, pedibus posterioribus piceis ; supra subopacus, elytris densius 

 reticulatis, guttulis duabus pallidis quarum posteriore conspicua ; coxis posterioribus 

 subtiliter strigosulis, raargine anteriore extus abrupte curvato, prosterni jjrocessu 

 elongato. Long. 10, lat. 5i m.m. 



I have only a single immature individual of this species before me ; it is a male 

 and its sexual characters seem to be just the same as those of Dytiscus biguttulus 

 (No. 797), but the form is so much narrower that I think it will prove to be a 

 distinct species. 



North Americca. 929. 



800. Ilybius confusus, Aube, M.C. — (Immaturus) ; Ovalis, sat convexus, baud 

 elongatus, ferruginous, supra posterius tenescens, crebrius subtiliter reticulatus, 

 elytris guttulis duabus pallidis, coxis posterioribus crebrius reticulatis, margine 

 anteriore extus abrupte curvatis. Long. 11|, lat. 6l m.m. 



The male has the basal joints of the front and middle tarsi a little dilated and 

 furnished beneath with moderately long hairs, bearing small palettes ; the claws 

 of the front feet are nearly simple, the hinder one however being emarofinate near 

 the base, on the hind feet the outer claw differs but little from the inner one 

 except that it is distinctly shorter. The apical ventral segment is quite destitute 

 of carina or rugosities. 



I have seen of this species only one male (from Dejean's collection) very immature 

 and in very bad condition. 1 should think the species will prove to be most allied 

 to I. inversus, (No. 785), but it has the coxte more densely and distinctly .sculptured 

 and the last ventral segment of the male without carina : and the front border of 

 the hind coxa has its outer part rather more abruptly deflexed. 



North America. (Coll. de Bonvouloir, ex mus. Dejean). 845. 



