762 On Aquatic Carnivorous Coleoptera or Dytiscidcc. 



transverse, but very distantly placed. Legs pale, femora piceous ; legs sometimes entirely black. 

 Length, -GB-'TO inch ; 16-5-175 m.m." 



This species is closely allied to C. seminiger, Lee, (No. 063), but according to a female recently 

 communicated to me, is narrower, has the legs and epipleui-se paler, and the sculpture of the thorax and 

 elytra much coarser than in the male of C. seminiger. — D. S. 



1233. Colymbetes includens, "Walk., List. Col. Lord, p. 14. Arabia. 



" Black, elliptical, smooth, shining. Head with an interrupted transverse tawny streak in the disc ; 

 forepart tawny, including a black spot on each side. Palpi, antennae and legs tawny. Prothorax 

 testaceous, with two abbreviated black bands, one in the disc, the other on the hind border. Elytra 

 with a testaceous ground hue, which is very closely covered with minute black speckles. Length of the 

 body C lines." 



1234. Colymbetes interclusus. Walk., Ann. Nat. Hist. 3rd Ser. II, 1858, p. 204. Ceylon. 



" Ater, capite antice, thoracis lateribus latis, elytrorum fascia lata basali et vitta marginali postice 

 attenuata hiteo-ferrugineis. Long. 5| lin." 



This is I believe a sj)ecies of Rhantus unknown to me. — D. S. 



1235. Colymbetes lateralis, Gebl., Nouv. Mem. Mosc. II, p. 40. Siberia. 



" Oblongo-ovalis, luteus, supra siibtilissime alutaceus, thorace macula apicaU elytrisque nigro-SBneis, his 

 margine late luteo. Long. 4 lin., lat. 2 lin. Eneo-nitidus." 



Motscliulsky in Schreuck's Amur Reise, p. 102, assigns this species to the genus Ilybius. — D. S. 



1236. Colymbetes latus, Gebl. Bull. Ac. Pet. VIII, 1841, p. 371. Siberia. 



" Dilatatus, niger, subtilissime coriaceus, ore, antennis, thoracis extreme mai'gine pedibusque anticis 

 fetTugineis, thoracis lateribus longitudinaliter impressis, ruguloso-punctatis, elytris postice depressis, late 

 rotundatis, lineis tribus subelevatis et pone illas striis tribus e punctis majoribus. Long. 4| lin., 

 lat. 2f lin." 



" Valde affinis C. bipustulato; sed statura latiore et forma elytrorum differre videtur." 



The genus appears to me doubtful, although the comparison made is, I suppose, with a species of 

 Agabus. — ^D. S. 



1237. Colymbetes lineatus, Redt., Hugel. Casch. IV, p. 503, pi. 23, f. 5. India. 



" Ovalis, niger, clypeo, vertice, angulis anterioribus thoracis, antennis, palpis pedibusque anterioribus 

 mfo-femigineis ; elytris stiiis macularibus basique pallide-testaceis. Long 3."' " 



" Durch seinen flachen Kbrper und vollkommene ovale Form desselben auffallend von der 

 gewohnlichen Form der Colymbeten verschieden." 



I know nothing like this, and am doubtful what it should go near ; perhaps the Japanese Agabu.'i 

 dissimilis, No. 766. — D. S. 



1238. Colymbetes mageUanicus, Bab., Tr. Ent. Soc. Ill, p. 10. Patagonia. 



" Ovatus, niger, subdepressus, elytris subcostatis macula parva laterali oblonga fenestrata, subtus 

 niger, antennis pedibusqiie fuscis. Long. 3, lat. H lin." 



" Ovate, black, verj- minutely reticulate strigose. Head immaculate. Antennae fuscous. Thorax 



