?•')$ On Aquatic Carnivorous Coleox>tera or Dytiscidce. 



1215. Colymbetes bicolor, Kii'b., Faun. bor. Am. TV, p. 70. North America. 



" Ater, ellipticus, convexus, nitldus, ore antennisque testaceis ; pedibus elytrisque latere extemo, 

 brunneis ; prothoracis serie postico continuo. Length of the body, 3 J lines. A single specimen in lat. 54°." 



The Munich Catalogue refers this to the genus Agabus. — D. S. 



1216. Colymbetes bimaculatus, Perroud, Ann. Soc. Lui. Lyon. XI, 18G4, p. 78. New Caledonia. 



" Elongato-ovalis, depressiusculus, levis, nitiJus, fusco-brunneus. Capite antice posticeque rufo, 

 antennis testaceLs. Prothorace lateribus paulo oblique rotundatis, rufo-brunneo, antice transversim 

 pimctato. Scutello triangiilari. Elytris subtiliter striato-punctatis, brunneis, postice lateribus flavo 

 limbatis et singiilatim ad basin macula transversaH flava uotatis. Corpore subtus pedibusque testaceis. 

 Long. 0,004m. ; larg. 0,001 ^m." 



" Cette petite espfece prise par M. IVl ontrouzier, a Jengeu, dans la Nouvelle Caledonie a quelque 

 resemblance a 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. ; epaiss. 4 m.m. Minor, niger, capite duplicizona luteo-rubro ornato. 

 Thorace transverso, anterius et in medio limbi nigro, alias luteo-rubro, la^vi. Scutello conspicuo, trian- 

 gulari, Isevi. Elytris ovatis, convexis, l!B^^bus, nigris, margine tribusque zonis, quarum duae posteriores 

 interruptse, luteis." 



" La couleur gen^rale du corps est d'lin noir vernisse. La tete 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 scarLficatus, nitidus, niger, elytris vix distincte costulatis, fuscis, margine 

 dilutiore ; palpis, antennis, tibiis tai-sisque rufis. Long. 3^ 1. lat. 1^ 1." 



" Plus allonge et plus large vers la tete que notre Col. Sturmii ; elytres plus ctroites et plus ou moins 

 rembrunies, avec deux lignes de points imprimes sur le milieu et quelques autres epars et irregulierement 

 places vers les bords." 



It is probable that this description indicates a species of Agabus. — D. S. 



1219. Colymbetes darwimi, 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. 2| — 3 lin." Tierra del Fuego. 



" Ovate, flavesceut, fusco flavescent, or fuscous. Crown of tlie head black, with a transver.se flavesceut 

 spot, which is connected by its middle with the anterior concolorous part of the head, so as to form a T 

 shaped mark. Antennse 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 strife rather strongly 

 marked, and formed of irregular punctm-es. Body l)eneath black, or fuscous black. Legs dark yellow or 

 fuscous." 



