22 Rev. H. Clark on the Dytiscidee and Gyrinide of Australasia. 
4. C. Victoria, n. sp. 
C. elongato-ovalis, parallelus, punctato-striatus, subtilissime punctatus, 
fusco-niger, nitidus; capite inter oculos bifoveolato, sparsim punctato, 
ad apicem et basin rufo; thorace antice emarginato, lateribus tenue 
marginatis, ad basin sinuatis, disco subtiliter acuducto, antice trans- 
verse punctato-depresso, ad medium longitudinaliter obscure foveolato, 
rufo-fusco ad latera rufo; elytris tribus seriebus obsoletis punctorum 
subliliter striato-punctulatis, ad margines aliquando rufis; pedibus an- 
tennisque pallide rufis, corpore subtus ferrugineo. 
Long. corp. 2+ lin., lat. 4 lin. 
In details of structure very nearly allied to, but in general appear- 
ance different from, C. simplex ; it is decidedly smaller in size, rufo- 
ferruginous instead of black, and when seen under a high power less 
glabrous. Besides these apparent differences, it will be seen that the 
elytra differ in their strie-like punctures: in this species there are 
three rows, minute, but closely and regularly arranged ; in C. simplea 
there are four, and in some examples traces of five, the punctures of 
which are much more scattered. 
This species was taken in Victoria by Mr. Bakewell. In that 
gentleman’s cabinet, as well as in the collections of the British 
Museum and the Rev. H. Clark. 
Tribe V. Dyviscip®. 
Genus 1. HypEroprs, Hope (Coleopt. Manual, part 3. p. 166). 
1. H. Shuckardii, Hope (loc. cit.). 
I have examples before me of this species from Van Diemen’s 
Land, as well as from Victoria; it is not rare in Australian collec- 
tions: the description by Mr. Hope sufficiently characterizes it ; he 
points out the great breadth of the medial tarsi of the male, having 
evidently before him examples of the ordinary forms of ¢ and 9°. 
It has long been known that among Hydradephaga two forms of 
females are frequently to be met with, especially in the genera 
Hydroporus and Dytiscus ; one smooth and glabrous like the males ; 
the other rough, granulated, and opake. This second form is met 
with in this genus, four examples of which are in the collections 
of the British Museum, Mr. Bakewell’s, and my own. The surface 
of the elytra (and less markedly so of the thorax) is coarsely and 
closely vermiculated, so closely and coarsely as to give to it the 
appearance of almost rough granulations: but, besides this third 
form, I have in my collection a fourth form, or rather a form ex- 
actly intermediate between the two forms of ? ; the surface is opake, 
