376 On Aquatic Carnivorous Coleoptera or Dytiscide. 
336. Hyphydrus pictus, Klug, M.C.—Ovalis, sat latus, nitidus, ferrugineus, supra 
rufo-testaceus, prothorace medio infuscato, elytris nigro-signatis ; thorace crebre for- 
titer punctato ; elytris inzequaliter punctatis, punctis majoribus sat magnis, minoribus. 
ad basin et ad latera obsoletis apicem versus distinctis, stria discoidali distincta. 
Long. 43, lat. 3m.m. 6. 
Mas, trochanteribus anterioribus profunde incisis, incisurse margine externo tenui, 
subhamato ; abdominis segmento apicali elongato profunde transversim impresso, 
apice prolongato, inerassato et truncato; tibiis et tarsis anterioribus leviter 
dilatatis. 
Fem., paulo minor et magis subtiliter punctata, thoracis angulis posterioribus 
magis acutis, trochanteribus simplicibus, abdominis segmento apicali ante apicem 
transversim impresso, apice obtuse rotundato. 
This species appears to be variable in punctuation and colour; the punctuation 
on the wing-cases is often much effaced, and the black markings are sometimes very 
indistinct. 
I think Klug’s description may apply to this species; it is not however very 
characteristic, and I may be mistaken in my interpretation of it. 
Egypt, Sinai, Arabia. 29. 
337. Hyphydrus africanus, n. sp.—Ovalis, latus, nitidus, convexus, ferrugineus, 
supra rufo-testaceus, prothorace medio infuscato, elytris nigro-signatis ; thorace: 
crebre fortiter punctato, elytris crebre, sat fortiter, vix inequaliter punctatis, punctis 
majoribus minus conspicuis, minoribus ad basin subtilioribus ; stria discoidali ad basin 
sat distincta. 
Mas, trochanteribus anterioribus incisis, incisuree margine externo crasso ; 
abdominis segmento apicali vix impresso, apice tuberculato ; tibiis anterioribus 
dilatatis. Long. 43, lat. 3 m.m. 
Fem., minor, paulo magis subtiliter punctata, trochanteribus et abdomine muticis. 
Long. 4, lat 2¢ m.m. 
Very closely allied to Hyphydrus pictus, but broader and more convex, the 
punctuation more distinct, and the front tibize of the male much broader, the apical 
segment of the hind body less developed in the male. 
Senegal. 30. 
338. Hyphydrus crassus, Woll. Col. Hesp. p. 33.—Ovalis, sat convexus et latus,. 
erebre, fortiter, vix inequaliter punctatus, piceus, capite, thoracis lateribus angustius,. 
elytrisque rufo-testaceis, his nigro-signatis, stria discoidali ad basin sat distincta. 
Long. ¢ 43, lat. 3 m.m. 
Mas, trochanteribus anterioribus incisuree parve margine externo crasso, abdom- 
