39S On Aquatic Caruicorous CoUoptera or DytisciJte. 



This species is closely allied to Hypliydrus qiiinquelineatus, (No. 387), but 

 the punctuation of the thorax and elytra is denser, and the punctures on the latter 

 differ little from one another in size. Tlie fovea at the shoulder of the elytra also 

 is less deep. 



Egypt aud Mount Siiiai. 183. 



391. Ca'lanibiis iuterruptus, n. sp. — Breviter ovalis, convexus, nitidus, sine 

 pubescentia ; testaceus, elytris lineis fractis, nigris ; elytris fortiter sub-irregulariter 

 punctatis. Long. 3, lat 2 m.m. 



Mas, abdomine nigi-icante. 



This species is very similar to Hyphydrus quinquelineatus (No. 387), but it is 

 j)aler in colour, and the elytra have their black lines more disintegrated, and the 

 punctuation coarser : in colour and the marks of the elytra it greatly resembles 

 Hydroporus musicus, but it is smaller aud narrower, and the punctuation of the 

 elytra is distinctly unequal, the punctures on the basal portion of the wing-cases 

 being a mixture of coarse and fine ones. 



The front and middle tarsi are slender in each sex, and I can see no sexual 

 difference in the sculpture ; some of the females are not very much smaller in size 

 than H. musicus. 



Mesopotamia, Dr. Milliiigen. 1137. 



392. Coelambus muticus, n. sp.— Ovalis, convexus, pernitidus, sine pubescentia, 

 niger, prothorace medio anguste lateribusque rufescentibus, elytris testaceis lineis 

 latis nigris ; femoribus piceis, tibiis tarsisque rufis, antennis testaceis articulo ultimo 

 fusco; prothorace crebre distincte punctato ; elytris basi subtiliter apice crebrius et 

 fortius punctatis, stria disooidali punctorum; clypei margine cra.sso sed medio 

 interrupto. Long. 4, lat. 2h m.m. 



This species is about intermediate between Hydroporus musicus (No. 390), and 

 Dytiscus parallelogrammus (No. 416); the marks on the elytra are, the suture and an 

 elongate line near it, and some more irregular marks external to these, black. The 

 breast is impunctate in the middle, coarsely punctured at the sides. The ventral 

 segments are rather closelj' punctured. I see no sexual distinctions. 



Abyssiiiia, (fouud by Eaffray at Goumdet, Agaos, and Lake Tzana). 185. 



Group 3. 



393. Coelambus chinensis, n. sp. — Oblongo-ovalis, convexiusculus, nitidus, sine 

 pubescentia, pectore abdomineque nigris, capite thorace pedibusque ferrugineis, hoc 

 f;asi nigricaute, elytris obscuris, basi parce apice crebre punctatis, basi seriebus 



