355 



ZupJdum? hicolor, N. E. F. vol. vii. p. 117, is the Helluo prceustus, 

 Dejean; and Diccelus Leonardil, ibid, p. 132, is D. politus, Dejean. 



Through inadvertence the description of Di/tiscus ihoracicus, (N. E. F. 

 p. 156) was offei'ed for publication; it is identical with D. liberus of Prof. 

 Say, who desci-ibed it in the Journal Acad. Nat. Sciences, in 1825, from 

 specimens sent him by me. The following should have occupied its place 

 in the Farmer. 



Dytiscus *basillaris. Black, levigated, impunctured; dilated frontal spot 

 and transverse vertical line on the head, lateral margins and transverse 

 narrow fascia of the thoi'ax, humerus, obsolete external margin and intei'- 

 rupted basal fascia of the elytra, yellowish. Palpi and four anterior feet 

 pale ochreous yellow; hinder pair piceous, thighs paler. Elytra with three 

 series of punctui-es, external one faintly impressed, sutural sei-ies none. 



Length two-fifths, breadth a little more than one-fifth of an inch. 



Specimen a male in the cabinet of W. Oakes, Esq. 



The following supposed new species of Colymbetes, for which I am in- 

 debted to Mr. Oakes, was captured by him in Ipswich, in November 1828, 

 and was received too late for description in the sixth number of the Con- 

 tributions. 



Colymbetes *sculptilb. Black, acuducted; head, before, and external 

 margins of the elytra yellow; a transverse, ferruginous, vertical spot; tho- 

 rax yellow with black spots; elytra transversely striated; feet ferruginous. 



Length eleven-twentieths, breadth over three-tenths of an inch. Body 

 black, elliptical. Head with minute, short, irregular, acuducted lines, 

 black; nasus ochreous; a transverse, ferruginous, vertical spot, and an 

 oblong indentation near each eye. Thorax, with rivose impressed lines, 

 oclireous; two confluent, transverse, central spots, a lunated oblique one on 

 each side, and two linear ones, sometimes interrupted into -four, near the 

 base, all black. Elytra polished, transversely and regularly striated or 

 acuducted; a subsutural, two central, and a submarginal dilated series of 

 punctures; external margin and epipleura ochreous. — Body, beneath, with 

 abbreviated, irregular, transverse, acuducted lines, black, ventral segments 

 piceous at tip. Feet dark ferruginous. 



This species is of much more attenuated and elongated form than Dylis- 

 cus fusctis and striaius, F. to both which European species it is closely allied. 

 The anterior orbitar process, which projects over the eye in front, is very 

 conspicuous in this species, and we find it more or less so in every one of 

 the genus, for the determination of which it is an excellent auxiliary 

 character. 



[The remaining corrections have been inserted in the text.] 



