474 Mr. F. Bates on New Genera 



the former are strongly incrassated and somewhat arched, 

 and the latter much thickened and strongly and acutely pro- 

 duced at the apex within) than in the form of the last joint of 

 the maxillary palpi (in the same sex), as we find in some male 

 examples of the Dryops (Ananca?) strigipennis. White, a 

 precisely similar form of palpus as in Selenopalpus cyaneus — 

 i. e. the last joint strongly expanded, flattened, and with a 

 deep semicircular excision at the outer edge. 



The Zolodinus zelandicus, Blanch., has the very exceptional 

 character of having the hind margins of the third and fourth 

 ventral segments corneous *. 



The Mimopeus amaroides, Pascoe, judging from description, 

 will be the same as the Cilibe elongata, Breme. 



The genus Rygmodus , White, has been shown by Mr. C. O. 

 Waterhouse (Journ. of Entom. v. p. 194) to belong to the 

 Hydrobiidce. 



The number of the now described New-Zealand Heteromera 

 amounts to but 40 species, distributed in 22 genera ; there are 

 doubtless many more to come. 



Cilibe opacida, n. sp. 



Somewhat broadly oval, but little convex ; brownish black, 

 the elytra usually with a tinge of dark chocolate- (or purplish) 

 brown ; subopaque. Head and prothorax finely and very closely 

 punctured, the interstices (except on the epistoma and disk of 

 prothorax) a little elevated and reticulate ; epistoma broadly 

 truncated in front, the angles rounded, the suture strongly 

 marked at each side : prothorax deeply arcuately (sometimes 

 slightly sinuously) emarginate in front; front angles prominent, 

 subacute, slightly convergent ; base more or less strongly 

 bisinuate-emarginate ; the hind angles more or less produced, 

 kcute, directed behind or sometimes a little outwardly, reposing 

 on the shoulders of the elytra ; sides gradually narrowing in a 

 slight curve from base to apex, sometimes ( ? ?) subparallel 

 from the base to a little beyond the middle, thence rapidly 

 curvedly narrowed to the apex ; usually they are very slightly 

 sinuous in front of the hind angles ; disk very moderately 

 convex, lateral margins rather broadly expanded, a little 

 reflexed or concave, and unequally thickened at the edges ; 

 base and apex more or less distinctly margined or thickened 

 at each side, sometimes throughout at the apex ; a more or 

 less distinct, transverse, angulate impression at each side of 



* It is the same in the genus Calcar and in another, allied but unde- 

 scribed, South-American genus ; these somewhat militiite against the 

 value of this as a great divisional character, as laid down by Drs. Le 

 Conte and Horn. 



