On Aquatic Carnivorous Coleoptera or DytiscidcB. 535 



752. Dytiscus fuscipennis, V-Ayk., Agahus fuscipennis, M.C. — Ovalis, posterius 

 jingustatus, convexus, ferrugineus, subtus plus minusve infuscatus, sat nitidus, fere 

 lievigatus ; prothorace elongate, antrorsum conspicue angustato, lateribus obliquis 

 hand curvatis. Long. 10, lat. 5f m.'m. 



The male has the three basal joints of the front and middle tarsi distinctly 

 incrassate, and furnished beneath with hairs bearing moderately large palettes, the 

 claws of the front feet are elongate and but little curved, a little sinuate beneath 

 and rather slender. 



This species though not much shining has the sculpture only slight, the usual 

 subserial punctures being obsolete, the surface has however an excessively fine and 

 minute reticulation which pi'events it being shining, and there is even a very slight 

 sexual difference in this respect, the female being rather duller than the male. 



The species varies somewhat in colour, the individuals from Germany being darker 

 than those from Lapland ; indeed in the examples from the former of these countries, 

 the prothorax is generally quite infuscate, with the sides reddish. 



Northern Eiirojie, Siberia, (Sweden, Finland, North Germany). 807. 



753. Agabus coxalis, n. sj). — (<?) Ovalis, latus, posterius acuminatus, sat convexus, 

 sublfevigatus, minus nitidus, testaceus, subtus et vertice nigro-ornatis, elytris vix 

 fusco-nebulosis ; prothorace antrorsum fortiter angustato. Long. 10, lat. 6 m.m. 



The male has the three basal joints of the front and middle tarsi very broad, and 

 but little compressed, and they are furnished beneath with rather long hairs, bearing- 

 large palettes ; the claws on the front feet are very unequal, the front one being 

 short and thick, while the hinder one is quite twice as long : the claws of the 

 intermediate feet are equal and simple. The female I have not seen. 



The species resembles Dytiscus fuscipennis in form, but is readily distinguished 

 by its variegate undersurface, the hind coxse being broadly pale yellow in the 

 middle, and suirounded with black ; the elytra are rendered dull by an excessively 

 dense and minute but very regular reticulation : the broad male tarsi are remarkable. 

 The serial punctures of the elytra are extremely obsolete. 



Eastern Siberia, (Angara) ; Lapland. 808. 



Group 22. 



Prosternal process extremehi compressed ; wings of metasteruum short, coxal lines 

 much approximated, abruptly turned outwards at the apex ; apical joints of antennce 

 dilated in the male. 



Three species from both Old and New Worlds. 



