PHANITHON. 357 
more extended along the carina and the markings of the elytra smaller; the black 
spots on the pygidium are also larger. This specimen represents perhaps a Mexican 
subspecies. 
4, Phenithon pollux, sp.n. (Tab. XIII. fig. 11.) 
Q. Black; femora and bases of tibiz rufescent ; dark parts of upperside deep brown, light parts luteous-grey 
or clay-colour, as follows: a broad mesial vitta on rostrum and head, covering the whole frons; the 
whole pronotum, except two irregular brown vitte which include some grey dots before middle and some 
lateral brown speckles ; the scutellum; the elytra, with the exception of an irregular transverse median band 
which divides at the sixth stripe of punctures into two bands—one running obliquely towards shoulder 
which it does not reach, and the other obliquely backwards to outer margin,—both branches including 
grey or clayish speckles, the elytra bearing, moreover, a number of brown dots on suture, the one 
behind scutellum being the largest, three dots at basal margin, namely, one at scutellum, another halfway 
to shoulder, and the third below shoulder, besides a large patch on basal callosity ; pygidium unevenly 
pubescent ; underside (with the exception of numerous brown specks on the prosternum, two dots on the 
metasternite, and a row of minute lateral spots on the abdomen), tibie and first tarsal segments (except 
their apices), and femora, luteous white. 
Frons slightly concave, with the vestige of a channelled mesial carina. Prothorax not quite so broad as long, 
feebly depressed before carina, the latter somewhat concave in middle. Elytra rather strongly striped, 
the interspaces more or less convex, especially the third. Pygidium rounded at apex, anal sternite 
emarginate. Prosternum depressed in middle. Mesosternal process with the angles very slightly 
tuberculiform. 
Length 8-10 millim. 
Hab. Mexico, Toxpam (Saillé). 
Two females. 
5, Phenithon castor, sp.n. (Tab. XIII. fig. 13.) 
Q. Very similar to the preceding insect. Rostrum shorter, being twice as broad at base as long. Pronotum 
deeply impressed before base and depressed behind apical margin, vitte sharply defined, a small brown 
lateral dot present at apical margin; carina more deeply concave in middle. LElytra more broadly 
depressed at suture, much more finely striate-punctate; a large luteous patch extending from base to 
middle, reaching to shoulders at basal margin, sinuous at the sides, irregularly truncate behind, including a 
prown dot behind scutellum ; a round luteous apical patch on each elytron including each a brown dot, 
a luteous, irregularly triangular limbal spot just before middle. Pygidium and sides of under surface 
more evenly pubescent luteous; a spot laterally at apical margin of pronotum, two on episternum of 
metasternite, and one each on second and third abdominal segments, brown; the luteous pubescence 
of abdomen rather sharply limited, forming a lateral spot on fourth segment. Prosternum shorter than 
in P. pollux, being only two-thirds as wide before the coxa as the coxa itself. Process of mesosternite 
vertical, with the apex less slanting than in P. pollua First fore tarsal segment shorter. 
Length 9 millim. 
Hab. Mexico, Toxpam (Sallé). 
One female. 
6. Pheenithon discifer, sp. n. (Tab. XIII. fig. 14.) 
9. Black, upperside irregularly irrorated with clay-colour, underside dotted with luteous-grey, the dotting 
dense and well-defined at side, middle more evenly grey: two basal spots on pronotum and a large 
rounded sutural patch on elytra velvety-black, sharply defined, more or less bordered with luteous 
3 AA 2 
