On Aquatic Carnivorous Coleoptera or Dytiscide. 631 
same as in the two preceding species, the front tarsi are perhaps still narrower. 
The female I have not seen. 
Found by Dr. Millingen, in the East; I believe in the western part of Northern Persia, 923. 
977. Colymbetes procerus, n. sp.—Ovalis, elongatus, angustulus, sat convexus, 
nitidus, nigricans, antennis palpisque rufis, pedibus anterioribus rufo-obscuris, 
posterioribus nigricantibus, capite anterius et in medio verticis rufescente, prothorace 
lateribus elytrisque testaceis, his creberrime transversim nigro-irroratis ; corpore 
sublevigato; elytris punctis seriatis subtilibus sed conspicuis; abdomine sutura 
secunda ventrali utrinque prope medium evidenter serratulo. Long. 15, lat. 72 m.m.- 
This species is narrower than its allies, and the mixture of transverse yellow and 
black marks on the wing-cases is not so indistinct; their sculpture is even more 
indistinct than it is in C. vagans, and there is a scarcely perceptible difference in 
the sculpture of the sexes. The male characters are similar to those of the allies. 
Arabia. 924. 
I. 64.—Genus MELADEMA. 
Side pieces of fourth and following ventral segments very narrow ; metasternal 
groove moderately well developed ; hind tarsi elongate, their terminal joint distinctly 
longer than the preceding one. 
Only two species,* from Southern Europe, the Canary Islands and Madeira are 
known to me. 
978. Meladema coriacea, Cast., Scutopterus coriaceus, M. C.—Oblongo-ovalis, 
latiusculus, parum convexus, subopacus, niger, antennis palpisque rufis, pedibus 
nigro-piceis, vertice parum distincte rufo-binotato ; thorace coriaceo, basi utrinque 
profundius emarginato; elytris punctis impressis quasi scutatis densis sculpturatis, 
punctis seriatis conspicuis. Long. 21, lat. 12 m.m. 
The male has the three basal joints of the front tarsi considerably dilated, and 
but little compressed, and furnished beneath with four series of rather large palettes, 
the marginal hairs are rather well developed, and there 1s a narrow basal band of 
pubescence, close to the first series of palettes, the fourth joint is short, and is dis- 
tinctly incrassate ; the claws are moderately long, and nearly simple and equal: 
the tarsi of the intermediate pair of legs have the basal joints more compressed, 
* Scutopterus imbricatus, Woll. (No. 1505 huj. op.), Madeira, is a third species of the genus. 
