764 On Aquatic Carnivorous Coleoptera or Dytiscide. 
and side ; epipleura yellow ; sculpture of the elytra like that of C. semipunctatus, but fewer punctures in 
the side ; legs ferruginous ; body underneath longitudinally scratched.” 
“This species appears to be the American representative of C. paludosus (Dytiscus politus, Marsh.) 
which it nearly resembles, but the anterior part of the front is black, and not yellow as in that species ; 
and the prothorax is wholly black, without a broad rufous margin.” 
In the Munich Catalogue this is placed as a synonym of Colymbetes discolor, Harris (No. 1222). Ido 
not know on what authority.—D. 8. 
1244, Colymbetes picipes, Kirb. Faun. Bor. Am., IV, p. 71. North America. 
“Ovalis supra seneo-niger, obscurus, reticulatim confertissime acuductus ; ore antennisque ferrugineis ; 
edibus quatuor anterioribus piceis. Length. 4} lines. Near C. ater.” 
g 4 
This is possibly an Ilybius near I. ignarus, (No. 789).—D.S. 
1245. Colymbetes rotundicollis, Bab., Tr. Ent. Soc., 1841, p. 7. Patagonia. 
“‘Oblongus, thorace elytrorum basin quanti, lateribus rotundatis, fuscis, subtus niger; elytris crebre 
nigro-reticulatis 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 fovez 
between the antenne. ‘Thorax transverse, short, broadly emarginate in front, with the angles acute, the 
sides rounded, depressed, rugose, the hinder margin sinuated with a small longitudinal impression on 
each side, the hinder angles rounded ; the anterior margin black, and several irregular dark clouds upon 
the disk. Scutellum dark fuscous, with its acute apex paler. LHlytra oblong-ovate, so thicklv covered 
with dark broad reticulations as to appear nearly black, the interior margins paler, the usual striz rather 
strongly marked. Body beneath black. Legs fuscous.” 
“ Wab., alpine situations in Tierra del Fuego.” 
This is no doubt a species of Lancetes, very close to C. preemorsus (No. 916), possibly identical there- 
with.—D.8. 
1246. Colymbetes ruficeps, Men. Cat. rais., p. 141. Caucasus. 
“Oblongo-ovatus, subdepressus, niger; capite, antennis, thoracis medio, pedibusque obscure rufis. 
Long. 4 li., larg. 2 li.” 
“Tl est un peu plus eétroit et plus petit que le Col. confinis, Gyll., mais sa couleur le fait surtout facile- 
ment distinguer.” 
“ Lenkoranka, juin, deux exemplaires non loin de la mer.” 
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 Linge, gegen 2 Linien breite; Farbe glinzend schwarz ; fliigeldecken sehr klein punktirt 
mit zwei auf jedem fligelrand befindlich braun-gelben puncten, wovon die oberen, uber die mitte gegen 
hinten, gut bemerkbar, die anderen aber, gegen das ende der fltigelspitzen fast unkenntlich sind ; braune 
fuhlhérner, unten braun, gegen die spitzen schwarz. Hilt sich im faulen Holz auf.” 
This description cannot. 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. Arabia. 
‘Black, elliptical, smooth, shining. Head in front, palpi, antenne and four anterior legs reddish ; an 
impression on each side of the head.. Prothorax with reddish sides, and with a transverse reddish streak 
