Genera and Species of Coleoptera. 45 
the maxillary palpi securiform, of the labial narrowly triangular; pro- 
thorax finely punctured, convex, slightly transverse, rounded anteriorly 
and laterally, and narrowly margined; scutellum small, triangular ; 
elytra coarsely seriate-punctate, scarcely broader at the base than the 
prothorax, the sides gradually rounded to the apex ; body beneath with 
the sterna dull reddish ferruginous, the abdomen glossy black; pro- 
sternum subhorizontal posteriorly, incurved, ending in a short thick 
process which is only partially received in the shallow corresponding 
notch of the mesosternum ; intercoxal process rather broadly triangular ; 
legs reddish ferruginous, rather slender; tibize strongly curved, and un- 
armed ; tarsi narrow, hairy beneath, the basal joint slightly elongate, 
the last shorter than the preceding united. Length 4 lines. 
ApEtxatvs [ Cistelidee ]. 
Caput antice elongatum ; oculis magnis, reniformibus. Antenne breves, 
articulo primo vix incrassato, tertio ad septimum subzequalibus, haud 
nodosis. Tibie breves, curvate. Prosternum compressum, elevatum. 
The genera of Cistelidze do not appear to be distinguished from 
each other by any very trenchant characters. This genus is perhaps 
scarcely an exception, although in colour it differs essentially from 
_ Athyssius* and Tanychilus, genera to which, on account of their 
long muzzle, this is the most nearly allied: from these, and especially 
from the latter, it is separated by its shorter antenne, with the 
basal joint scarcely thickened, the nearly equal length of the third 
to the seventh inclusive, their subcylindrical form (not nodose at the 
end), the shorter and curved tibie, the larger and more reniform 
eyes, and the narrow prosternum. I only know the males. 
Apellatus lateralis. (Pl. II. fig. 1.) 
A, flayo-testaceus, glaber, subnitidus ; oculis vittaque elytrorum nigris. 
Hab. New South Wales. 
Fulvo-testaceous, smooth, subnitid, a stripe from the shoulder 
gradually widening behind, and at the apex nearly approaching the 
suture, and eyes black; head narrow, prolonged beyond the eyes, and 
rounded immediately behind them ; antennz about half as long as the 
* Hithysswus, proposed for Atractus, Lacord. (Macleay, Dejean), which name 
has been in common use since 1832 for a genus of Hemiptera. The name of 
another Heteromerous genus (Trigonotarsus, Hope) having been preoccupied by 
Guérin for a genus of Curculionidx, I have now to propose “‘ Sobas,” which I 
have used in a MS. list of the Australian Heteromera that I have in hand. I 
have also in the same list adopted as.a genus the division distinguished by two 
spurs to the anterior tibix, which M. Lacordaire has made in Nacerdes, and have 
named it ‘ Sess¢nda.”’ 
