and Species of Heteromera. 17 



collected all the species possible, and have especially endea- 

 voured to obtain as large a series as I could of each species. 

 I propose now to give some remarks on the species described by 

 me at that time, as well as to describe others that are new. 



Hypaulax marginata and smuaticoUis, mihi, I. c. p. 261. 



These two species appear to be very rare, as I have been 

 able to add but one other example of marginata j and not one 

 of sinuaficoUis, to the solitary example of each on which their 

 descriptions were founded. The two species are extremely 

 close to each other, but are, at present, well distinguished by 

 the characters given. By some strange error, I have given 

 the prothorax of sinuaticoIUs as longer than wide ; it is, as 

 well as the entire insect, relatively much naiTOwer in propor- 

 tion to its length than in marginata ; the labium is more 

 narrowly and deeply emarginate in front ; the space between 

 the palpi narrower and more convex on the face ; the 

 mentum is densely hirsute. In both species the mandibles are 

 strongly notched at the apex ; the gular furrow is very strong 

 and close to the base of the submentum ; the cheek-furrow is 

 deep and curved, extends nearly to the gular fuiTOW, and termi- 

 nates in a large, subpyriform pit or excavation. 



My second example of marginata is from Western Australia. 

 It is considerably smaller than the typical example (length 8 

 lines) ; the chin is strongly bearded ; the two impressions on 

 the prothorax are placed further from the base ; and the 3rd and 

 4th ventral segments are distinctly sinuate behind : these differ- 

 ences are possibly sexual, although I can see no difference in 

 the form of the anterior tibiae ; at any rate they are not of suffi- 

 cient value to warrant me in holding it as a distinct species. 



Hypaulax tarda^ mihi, I. c. p. 262. 



This species also appears to be very rare, as I have been able 

 to add but a second example. It is at once to be distinguished 

 from the two preceding by its strongly transverse prothorax, 

 with the hind angles more acutely produced and more outwardly 

 directed, and by its somewhat " squat " figure ; the mandibles 

 are notched at the apex ; the labium is broadly emarginate in 

 front, the space between the palpi naiTow, its face but little con- 

 vex ; the gular furrow is broad but less deep than in those pre- 

 ceding ; the cheek-fuiTOw is slightly arched, and does not ter- 

 minate near the gular furrow in an expanded subpyriform 

 excavation; the 4th ventral segment is convex and strongly and 

 somewhat sinuously emarginate behind ; and the sides of the 

 prothorax are more finely margined ; the intervals between the 

 rows of punctures on the elytra are flat, even at the sides and 



Ann. (& Mag. N. H. Ser. 4. Vol. xiii. 2 



