520 Mr. C. O. Waterhouse on 
Figs. 10, 11. Licmophora dubia, var. latior, Mer. Santa Catalina 
Island. “Y°, 
Figs. 12-14. Liemophora flabellata, var. parva, Mer. Figs. 12 & 13, San 
600 
Pedro; fig. 14, Monterey. =. 
600 
Figs. 15, 16. Grammatophora costata, Mer. Monterey. {- 
‘ SA O00 
Fig. 17. Fragilaria spicula, Mer., fixed on a Nitzschia. Santa Monico. ->. 
Figs. 18-20. Nitzschia spiralis, Mer.; the same frustule in three dilferent 
positions. San Pedro. ae 
Fig. 21. Rhabdonema, sp. Northern California. .. 
Fig. 22. Ditto. Part of a valve at 7 
: ; 600 
Fig. 23. Chetoceros incurvus, var. angusta, Mer. San Pedro. -—-. 
900 
Figs. 24-27. Eunotogramma, sp. San Pedro. +: 
LXVI.—Two new Genera of Coleoptera belonging to the 
Cupeside and Prionide. By CHas. O. WATERHOUSE, 
F.E.S. 
THe British Museum has lately received a small collection 
of Coleoptera from Rio Janeiro. It contained two remark- 
able genera, which I have no hesitation in describing as new. 
One belongs to the Cupeside, but differs from all known 
species in the form of the head and in having smooth an- 
tenne; the other to the aberrant Prionidx, and is allied to 
Mysteria. 
Cupeside. 
'TETRAPHALERUS, gen. nov. 
General form and characters of Cupes. Head elongate 
narrowed anteriorly. Hyes somewhat prominent. Anitcane 
smooth and shining, nearly as long as the head and thorax 
taken together, widely separated, placed in a deep impression 
near the base of the mandible, the impression continued poste- 
riorly beneath the head close to the eye and forming a deep 
channel, so that the antenna can lie in it when at rest. The 
two grooves are rather wider posteriorly, so that the flat 
under surface of the head between them is narrower behind 
than in front. ‘The mentum is small, concave, longer than 
broad, obliquely narrowed in front, rectilinear at the sides. 
[The palpi are wanting.] The maxillary palpi have the 
apical joint fusiform, rather more narrowed at the base 
than at the apex. Mandibles very prominent, incurved and 
enlarged at the apex, where they are bisinuate. Thorax a 
