430 HETEROMERA. 
large, convex, broader than long, the sides rounded and gradually converging from a little before the base, 
the hind angles subrectangular, the basal foves scarcely indicated, the disc unimpressed, the surface finely 
and very densely punctured; scutellum closely punctured; elytra moderately long, a little wider than the 
prothorax, subparallel in their basal half, with rows of fine punctures placed upon shallow strie, the 
interstices almost flat and very shallowly, finely, and thickly punctured; legs ferruginous ; beneath very 
closely punctured. 
Length 73 millim.; breadth 2? millim. 
Hab. Norra America, Arizona.—Mexico, Northern Sonora (Morrison). 
Two examples, apparently both males. This insect somewhat resembles H. puncta- 
tissimus and H. segnis; but differs from both in its much larger size, less transverse 
thorax, longer and stouter limbs, &c., and also from the latter by its more finely 
punctate-striate elytra; in its general shape and large eyes it approaches H. occidentalis 
&c. The Arizona example has been kindly lent to me for examination by Dr. Horn. 
12. Hymenorus segnis. 
Elongate, piceous-brown, opaque, densely clothed with short pubescence. Head closely and somewhat coarsely 
punctured ; eyes (2 ) rather small, somewhat widely separated ; antennse(@ ) rather short, the joints stout 
and short, ferruginous; prothorax transverse, rather convex, the sides rounded and narrowing from a 
little before the base, the hind angles rectangular, the base feebly bisinuate, the basal fovez indistinctly 
indicated, the surface very densely and finely punctured; scutellum closely punctured; elytra long, 
scarcely wider than the prothorax, subparallel in their basal half, shallowly and finely punctate-striate, 
the punctures closely placed, the interstices almost flat and very finely and closely punctured; beneath 
very closely punctured; legs rather slender, ferruginous. 
Length 63-62 millim.; breadth 23 millim. ( 9.) 
Hab. Mexico, Acapulco (Hége). 
Three examples only. This species somewhat resembles H. grandicollis, but differs 
from it in its much smaller, less convex, and widely separated eyes, shorter and stouter 
antenne, much more closely and deeply punctured elytral striae, more slender legs, 
smaller size, &c. From #7. confertus, Lec., it may be identified by its larger size, more 
elongate shape, more finely punctured elytral interstices, less filiform antenne, &c. 
13. Hymenorus tibialis. (Tab. XIX. figg. 24, 24a, 3.) 
Elongate ovate, dull brownish-piceous, the suture a little lighter, the elytra slightly shining, thickly and 
coarsely pubescent. Head closely and rather coarsely punctured; eyes very large, approximate in the 
male, very narrowly separated in the female; antenne rather short and stout in both sexes, the third 
joint a little shorter than the fourth, ferruginous; prothorax convex, transverse, the sides rounded and 
converging almost from the base, the hind angles rectangular, the base strongly bisinuate, the disc 
obsoletely canaliculate and shallowly depressed behind, the basal foves very small or indistinct, the 
surface finely and very densely punctured; scutellum closely punctured ; elytra scarcely wider than the 
prothorax, rather short, subparallel towards the base, finely and rather deeply punctate-striate, the punc- 
tures very closely placed, the interstices feebly convex and thickly punctured ; legs rather short, more or 
less ferruginous, the first joint of the posterior tarsi longer than the following joints united. 
g. Posterior tibie strongly sinuate within. The lateral lobes of the last ventral segment broad and stout, 
abruptly bent inwards towards the apex, and with the apices very sharply and acuminately extended 
towards each other; the central sheath narrow, the apical portion triangular in shape. (Fig. 24a.) 
Length 53-6} millim.; breadth 2-24 millim. (¢ 2.) 
