1853.] 858 
beneath, in Zenoa they are without lobes. Zenoa is also remarkable for its pro- 
tuberant front, and less exserted mandibles. 
CYPHONIDE. 
Coleoptera pentamera, antennis 11-articulatis, rarius biramosis, minus approxi- 
matis; ligula emarginata; coxis anticis conicis prominulis, acetabulis inter pro- et 
mesosternum receptis ; prosterno corneo, inter coxas angustissimo, non abbre- 
viato; mesosterno nec concavo, nec protenso; abdomine segmentis ventralibus 
5 liberis; coxis posticis plus minusve laminatis; tarsi articulo 4to precipue 
bilobato, ultimo brevi, unguibus parvis integris. 
A. Tarsi articulo 4to bilobo: 
Tarsi omnes articulo 3io distincto; (thorax non clypeatus.) 
Tibiz calcaribus obsoletis : : ° : - Helodes Latr. 
Tibie calearibus elongatis armate . ° . Scirtes Iliger. 
Tarsi postici articulo 3io vix distincto; (thorax cly- 
peatus) . ‘ . : - Sacodes Lec. 
B. Tarsi fililormes, tibize calcarate : : ° - Eucinetus Schupp. 
Hetoves Latr. (Elodes,) 1796. 
Cyphon Fabr. 1798. 
From the genus as defined by Guérin in his very beautiful monograph, con- 
tained in the ** Species et Iconographie générique des Animaux Articulés,” [ 
have removed certain species having the thorax extended over the head, to form 
anew genus Sacodes. ‘The remaining species may be grouped in the following 
manner : 
a. Antenne articulo 1mo aa 2 et 310 pee hoe minu- 
tissimo : : . . 6 Do tle 
b. Antenne articulis 2 et 3 parvis, illo 1 malore 5 . - Sp. 2—4. 
c. Antenne articulis 2 et 3 sequentibus paulo brevioribus . Sp. 5—12. 
ae 
1, H. discoidea, oblongo-ovalis, modice convexa, rufo-flava, pubescens, 
elytris dense punctatis macula maxima nigra communi notatis. Long.:16—:18. 
Guérin, Spec. et Icon. An. Art. No. 9, p. 9. 
Cyphor discoidus Say, Journ. Ac. Nat. Sc. 5,161. 
Georgia, Pennsylvania and Missouri. The antenne of the male are biramose, 
the third and following joints being furnished with two long cylindrical basal 
processes. The suture of the elytra is frequently yellow, so as to divide the 
large black spot. The male is very rare; the only specimen seen by me was 
kindly given me by Dr. Melsheimer. 
b. 
2. H. concinna, elongato-ovalis, minus convexa, nigra, tenuiter griseo- 
pubescens, thorace punctulato, elytris dense punctatis, lete rufis, basi trienteque 
postico nigris. Long. 16. 
San Francisco, California, June. Body oblong, very distinctly convex, 
rounded at each end, black, sparsely pubescent. Head scarcely punctured ; 
antennz half as long as the body, entirely black, 2d and 3d joints nearly equal, 
together scarcely two thirds the length of the Ath joint. Thorax nearly three 
times wider than long, emarginate in front, very slightly rounded on the sides, 
broadly rounded at the base, surface finely punctulate. Elytra one third wider 
than the thorax, almost parallel, tolerably densely punctured, with very faint 
traces of two lines; black, with a very broad transverse red band, extending 
from near the base to eer one third of the apex, and being a little dilated 
towards the suture ; epipleure, under surface and feet black. 
3. H.ruficollis, oblongo-elongata, atra pubescens, thorace subtilissime 
punctulato, rufo spe nigro notato, vel nigro elytris densius punctatis, obsoletis- 
sime tricostatis, tibiis tarsisque testaceis, antenna basi plus minusve testaceis, 
articulis 2 et 3io coniunetis 4to duplo brevioribus. Long. +15. 
