South- African Species of Cossonus. 399 



6. Cossonus transvaalensiSf sp. n. 



Lons:. 3|, lat. 1 mm. 



/yfoc/subcoiiical, black, shining, impunctate, with a distinct 

 shallow tiansverse impression boiiiiul the eyes ; forehea 1 with 

 a small central fovea ; eyes slightly prominent. Rostrum 

 about as lono; as head, moderately curved, cylindrical at base, 

 thence giadually dilated and flattened towards apex, upper 

 surface with very fine faint punctuation, the sides coarsely 

 punctured ; antennaj ferruginous, inserted about miJdle. 

 I'rothorax a little longer than broad, sides slightly rounded, 

 broadest about middle, constricted near apex, base bisinuate ; 

 upper surface plane, with a deep, sharply defined, V-shaped 

 central iniprcesion, which is filled with coarse punctures and 

 has no distinct central carina; discal area impunctate, the 

 sides closely and deeply punctured; colour black, glabrous. 

 Elytra rounded at base and scarcely broader than the thorax, 

 shoulders rounded, sides parallel to beyond middle ; upper 

 surface slightly convex, scarcely striate except close to base, 

 but with nine complete rows of deep separate punctures, 

 ■which are smaller apically and laterally, the intervals plane 

 and impunctate ; colour black, shining, glabrous. Legs 

 piceous, obsoletely punctured. 



Transvaal. 



Type in the British Museum. 



Nearly allied structurally to C. suturalis, Boh., but the 

 present species is a distinctly narrower and slightly more 

 convex insect, and, in addition to the characters mentioned in 

 the key, it may be distinguished by the coarser punctuation 

 of the rostrum and the difference in the striation of the elytra. 



7. Cossonus suturalis, Boh. 

 Cossonus suturalis, Boh. Schcin. Gen. Cure. iv. p. 1033 (1838). 



Long. 4—5, lat. 1-1 f mm. 



Head subconical, black, glabrous, minutely punctured, and 

 with a deep oblong fovea on forehead ; eyes slightly promi- 

 nent. Rostrmn about as long as head, very little curved, 

 sides subparallel at base, apical half with a slight quadran- 

 gular dilatation ; upper surface impunctate^ the sides faintly 

 j)unctured ; antennse ferruginous, inserted well in front of 

 middle. Prothorax a little longer than broad, sides sliglitly 

 rounded, broadest behind middle, apex distinctly constricted, 

 base gently bisinuate; upper surface depressed, with a broad 

 central impression, gradually dilated from near apex to base 

 and filled throughout with large confluent punctures, except 



