7G4 On Aquatic Carnivorous Coleoptcra or DytiscidcB. 



and side ; epipleura yellow ; sculpture of the elytra like that of C. semipunctatus, but fewer punctures in 

 the side; legs ferruginous ; body underaeath longitudinally scratched." 



" This species appears to be the American representative of C. paludosus CDytiscus politus, Marsh.) 

 which it nearly resembles, but the anterior part of the fi-ont is black, and not yeUow as in that species ; 

 and the prothorax is wholly black, ^vithout a broad rufous margin." 



In the Munich Catalogue this is placed as a synonym of Colymbetes discolor, Harris (No. 1222). I do 

 not know on what authority. — D. S. 



1244. Colymbetes picipes, Kirb. Faun. Bor. Am., IV, p. 71. North America. 



" Ovalis supra jeneo-niger, obscurus, reticulatim confertLssime acuductus ; ore antennisque ferrugineis ; 

 pedibus quatuor anterioribus piceis. Length. 4} lines. Near C. ater." 



This is possibly an Ilybius near I. ignarus, (No. 789). — D. S. 



1245. Colymbetes rotundicoUis, Bab., Tr. Ent. Soc, 1841, p. 7. Patagonia. 



" Oblongus, thorace elytrorum basin jequanti, lateribus rotundatis, fuscis, subtus niger; elytris crebre 

 nigro-i-eticulatis striisque disci punctatis, antennis pedibusque fuscis. L. 4, lat. 2 lin. " 



" Whole insect fuscous. Head nearly black on the crown, minutely punctured, with two deep fove<e 

 between the antennse. Thoi-ax transverse, short, broadly emarginate in front, with the angles acute, the 

 sides rounded, depressed, rugose, the hinder margin sinuated ^\-ith a small longitudinal impression on 

 each side, the hinder angles rounded ; the anterior margin black, and several iiTegular dark clouds upon 

 the disk. Scutellum dark fuscous, with its acute apex paler. Elytra oblong-ovate, so thickly covered 

 with dark broad reticulations as to appear nearly black, the interior margins paler, the usual striae rather 

 strongly marked. Body beneath black. Legs fuscous." 



"Hab., alpine situations in Tierra del Fuego." 



This is no doubt a species of Lancetes, very <;lose to C. proemorsus (No. 916), possibly identical there- 

 with.— D. S. 



1246. Colymbetes ruficeps. Men. Cat. rais., p. 141. Caucasus. 



" Oblongo-ovatus, subdepressus, niger ; capite, antennis, thoracis medio, pedibusque obscure rufis. 

 Long. 4 U., larg. 2 li." 



" II est un pou phis etroit et plus petit que le Col. confinis, Gyll., mais sacouleur le fait surtout facile- 

 ment distinguer." 



" Lenkoranka, juin, deux exemplaires non loin de la mei-." 



In the Munich Catalogue this is recorded as a species of Agabus, and probably this is correct. — D. S. 



1247. Colymbetes signatus, Grimm., Steirm. Col., p. 32. Styria. 



" 3 Linien Lange, gegen 2 Linien breite ; Farbe gliinzcnd schwarz ; fliigeldecken sehr klein pimktirt 

 mit zwei auf jedem liiigeli-aud Ijefindlich braun-gelben puncten, wovon die oberen, uber die mitte gegen 

 hinteu, gut bemerkbar, die anderen aber, gegen das ende der fliigelspitzen fast unkenntlich sind ; braune 

 fuhlhiirner, unten braim, gegen die spitzen schwarz. Hiilt sich im faulen Holz auf." 



ThLs description camiot be recognized as that of any particular species, although it perhaps indicates 

 an Agabus ; it had better pass into oblivion. — D. S. 



1248. Colymbetes simplex. Walk., List. Col. Lord., p. 11. Arnbia. 



•' Black, elliptical, smooth, shining. Head in front, palpi, antennae and four anterior legs reddish ; an 

 impression on each side of the head. Prothorax with reddish sides, and with a transverse reddish streak 



