758 On Aquatic Carnivorous Coleoptera or Dytiscide. 
1215. Colymbetes bicolor, Kirb., Faun. bor. Am. IV, p. 70. North America. 
“Ater, ellipticus, convexus, nitidus, ore antennisque testaceis; pedibus elytrisque latere externo, 
brunneis ; prothoracis serie postico continuo. Length of the body, 3} lines. A single specimen in lat. 54°.” 
The Munich Catalogue refers this to the genus Agabus.—D. S. 
1216. Colymbetes bimaculatus, Perroud, Ann. Soc. Lin. Lyon. XI, 1864, p. 78. New Caledonia. 
“ Hlongato-ovalis, depressiusculus, levis, nitidus, fusco-brunneus. Capite antice posticeque rufo, 
antennis testaceis. Prothorace lateribus paulo oblique rotundatis, rufo-brunneo, antice transversim 
punctato. Scutello triangulari. Elytris subtiliter striato-punctatis, brunneis, postice laterihus flavo 
limbatis et singulatim ad basin macula transversali flava notatis. Corpore subtus pedibusque testaceis. 
Long. 0,004m. ; larg. 0,001 4m.” 
“Cette petite espéce prise par M. Montrouzier, 4 Jengen, dans la Nouvelle Caledonie a quelque 
resemblance 4 premiere vue avec I’ Hydroporus sex-pustulatus.” 
Probably a Copelatus to be placed in my group I.—D. S. 
1217. Colymbetes clairvillei, Mont., Ann. Soc. Fr. 1860, p. 242. New Caledonia. 
“Long. 15 m.m. ; larg. 8 m.m. ; épaiss. 4m.m. Minor, niger, capite duplici zona luteo-rubro ornato. 
Thorace transverso, anterius et in medio limbi nigro, alias luteo-rubro, levi. Scutello conspicuo, trian- 
gulari, levi. Elytris ovatis, convexis, levibus, nigris, margine tribusque zonis, quarum duz posteriores 
interrupt, luteis.” 
“La couleur générale du corps est d’un noir vernissé. La téte est d’un jaune rouge avec une large 
bande vineuse noire en travers.” 
The colour would seem to point this out as a species of Sandracottus. In the Munich Catalogue it is 
recorded in the genus Agabus, but this is no doubt an error.—D. S. 
1218. Colymbetes costulatus, Motsch., Bull. Ac. Pet. 1859, p. 541. Siberia. 
“Oblongo-ovalis, dense scarificatus, nitidus, niger, elytris vix distincte costulatis, fuscis, margine 
dilutiore ; palpis, antennis, tibiis tarsisque rufis. Long. 3} 1. lat. 13 1.” 
“Plus allongé et plus large vers la téte que notre Col. Sturmii ; élytres plus étroites et plus ou moins 
rembrunies, avec deux lignes de points imprimés sur le milieu et quelques autres épars et irregulierément 
placés vers les bords.” 
It is probable that this description indicates a species of Agabus.—D. S. 
1219. Colymbetes darwinii, Bab., Tr. Ent. Soc., 1841, p. 8. Patagonia. 
“Ovatus, supra flavescens, subtus niger vel nigro-fuscus, vertice nigro, macula transversa flava, 
thorace antice et postice maculaque disci nigris ; elytris plus minusve crebre nigro-irroratis, striisque disci 
punctatis, antennis flavis pedibus flavis vel fuscescentibus. L. 5—6, lat. 25—3 lin.” Tierra del Fuego. 
“ Ovate, flavescent, fusco favescent, or fuscous. Crown of the head black, with a transverse flavescent 
spot, which is connected by its middle with the anterior concolorous part of the head, so as to form a T 
shaped mark. Antenne yellow. Thorax margined before and behind more or less broadly with 
black and an ovate transverse spot of the same colour on the disc. Scutellum black. Elytra 
ovate, dilated slightly beyond the middle, flavescent or fuscous yellow, thickly irrorated with black, 
in some specimens so thickly as to make the whole appear fuscous black ; the usual strie rather strongly 
marked, and formed of irregular punctures. Body beneath black, or fuscous black. Legs dark yellow or 
fuscous,” 
