REVISION OF THE BUPRESTID OF THE UNITED STATES. 193 
5th and 6th it is represented by a large puncture; I have seen nothing resembling this in 
any other species of the family. No external sexual characters. 
1. P. Web bii Lee. Proc. Acad., 1858, 66. Ures, Sonora, Dr. T. H. Webb. The sides of the thorax in this 
species are moderately rounded and obtusely angulated, and the base is the widest part. 
2. P. Woodhousei. Dicerca Woodhousei Lec. Proc. Acad., 6, 68. 
Var. major, P. valens Lec. Proc. Acad., 1858, 66. 
Creek boundary, Dr. 8. W. Woodhouse: Texas, Mr. A. Schott. The specimens from. 
Texas are of a larger size, and more robust form, and the ground color is darker, where- 
by the spots appear more brilliant, but I do not find any distinetly defined character upon 
which to separate them. It is readily known from P. W ebbii by the thorax being widest 
at the middle, and very much rounded on the sides. 
GROUP Il. 
In this group the sides of the posterior part of the prosternum are straight, or very 
feebly angulated, the apex is broad and obtusely rounded in most genera, but sometimes 
acute. The mesosternum is closely united to the metasternum by a transverse suture, 
and is broadly and deeply excavated through its whole length, for the reception of the 
prosternum, as in the preceding group. The antennal cavities are small, and the front is 
not lobed: the antennal pores are on the inferior edge, arranged in small fovese, which in 
our genera are usually marginal, but in Cinyra terminal. The scutellum is small and 
rounded, rarely transverse: the elytra are not serrate in any of our species. 
Our genera may be thus arranged. 
Prosternum postice obtuse rotundatum ; 
mentum totum corneum; 
scutellum parvum rotundatum - Dicerea. 
scutellum transversum - = Poecilonota. 
mentum antice membraneum - = Ancylochira. 
Prosternum postice acutum - - - Cinyra. 
Dicerca Esch. 
The species of this genus are more numerous in the United States than has been sus- 
pected, and, in many instances, are very closely related in appearance, though it is be- 
lieved that the notes given below, will enable them in every instance to be readily recog- 
nised. In this genus, as in Ancylochira, are found several species in which the ordinary 
sexual characters of the male are not observed. I have sought some mark by which these 
might forma separate group in the genus, but have not met with success: although they 
