of neio genera and species of Tenehrionidce.. 353 
slightly widened to beyond the middle, thence gradually — 
and slightly sinuously — narrowed to the ajiex, margins 
reflexed and slightly canaliculate within, very strongly so 
at the shoulders ; at near the middle of the basal margin 
there is a short, elevated ridge which seems to be a de- 
tached remnant of the prominent, reflexed margin at the 
shoulder ; epipleural fold broad, extending to apex: -pro- 
sternum very full and convex, its process robust, horizontal, 
prominent behind : me so sternum vertical in front and 
broadly and deeply concave, its epimera posterior : meta- 
sternum short : intercoxal process broad, parallel-sided, 
apex subtruucate and, in common with the base of the 
metatliorax, strongly indented ; hind margins of 3rd and 
4th ventral segments angularly (at each side) emarginate, 
and broadly coriaceous: legs moderate, femora strongly 
compressed, attenuate at base ; tibiaj straight, a little 
thickened at apex, the anterior with a single spur, the 
others with two very small, almost invisible ; the hind 
tibiae with a faint tomentose line near the apex within : 
tarsi wanting: antenncB — except the first six joints, which 
are absolutely similar to those in Hypocilibe — wanting: 
body elongate, moderately convex, smooth. 
The genera of the Nyctozoilides — like those of the 
Tenebrionides, Cnodalonides and Helopides — are now be- 
coming almost unmanageable by reason of the complexity 
of their relationship, or affinity, with the genera of other 
groups as established by Lacordaire. The present genus 
has lost, in feature, every trace of connection with the true 
Helceides, its facies being more that of the Coelometopides, 
The majority of its characters, however, are decidedly 
those of the Onosterrhus group, viz., the deeply immersed 
head ; the prothorax very strongly emarginate in front, 
with broadly guttered sides, and thickened edges ; the 
short, strongly transverse scutellum, &c. The form of the 
head, and the prothorax strongly constricted near the base, 
will at once serve to distinguish this geniis from Ono- 
sterrhus. 
Agasthenes Westicoodi, n. sp. 
Elongate, black, smooth, opaque ; labrum and antennte 
dark chestnut-red : head and sides of prothorax finely and 
not closely punctuated ; disk of the latter, and the elytra, 
exceedingly minutely (not visibly to the naked eye) punc- 
tulate ; elytra having at the extreme margin the usual row 
of rather close-set punctures, which do not extend to the 
cc 2 
