20 Mr. F. Bates on New Genera 



(obsoletely on the disk), the punctures moderate but deep, 

 rounded or oblong ; intervals nearly flat, more or less visibly 

 but always minutely punctulate ; apically the 1st stria is joined 

 to the 9tli (the 8th being joined to 9th at some distance from 

 the apex), the 7th to the 2nd, the 6th to the 3rd, and the 5th 

 to the 4th, or 3 and 4, 5 and 6, and 7 and 8 are joined together 

 behind in pairs : prosternal process very wide, strongly tri- 

 carinate, the middle carina much the widest and not enclosed 

 by the two outer ; end broadly truncated or trilobed behind, 

 in the latter case the middle lobe is the most prominent; 

 flanks of prothorax smooth : legs rather slender, and, together 

 with the underside, antennae, &c., shining black. 



Length 12^ to 13^ lines ; width of prothorax across the 

 middle 4^ to 5 lines ; width of elytra behind the middle 5^ to 

 6 lines. 



Hah. Champion and Nicol Bay, West Australia. Two 

 examples. 



Var. Parryi. 



Smaller {\0\ to \1\ lines) than the type, more convex, espe- 

 cially the prothorax, the punctuation on the intervals of the 

 elytra obsolete or altogether absent, and the stride at the apex 

 confusedly united to each other. 



Two examples obtained from the collection of Major PaiTy, 

 labelled " Voyage of the ' Beagle.' " 



Hypaulax orcus, Pascoe [Nyctobates), Journ. Ent. ii. p. 453. 



This very variable species is nearly related to the preceding, 

 but may be distinguished by its more oblong parallel form ; 

 the prothorax is less strongly transverse, the apex decidedly 

 arcuate emarginate, the front angles consequently appear more 

 prominent, and are subacute or narrowly rounded ; the sides 

 anteriorly are much less strongly rounded, the hind angles 

 longer, more acute, and obliquely outwardly directed, the apex 

 is wider, equal to, or narrower than the base 5 the head and 

 prothorax are almost smooth ; the base of the elytra less di- 

 stinctly wider than the base of the prothorax ; the stri« more 

 distinct, the intervals, especially at the sides and apex, convex ; 

 the legs are stouter ; the gular fun-ow situated a little nearer to 

 the base of the submentum ; the flanks of the prothorax strongly 

 wrinkled on the middle ; the middle carina of the prosternal 

 process much narrower, the two sulci are consequently much 

 wider and are continued in front (at right angles) halfway across 

 the sternum, in front of the coxa?., the prosternum thus appearing 

 to have a strong transverse impression before the coxse ; this 



