COLEOPTERA. 
79 
date, probably caused by friction, but existing in the majority of the 
specimens. 
Scutellum minute, subcircular, clothed with whitish pubescence. 
Elytra truncate at the base, with a thin raised margin ending at 
the angles of the thorax, thence very slightly obliquely, but rather exten¬ 
sively, dilated to the shoulders, which are obtuse and callose: they are much 
broader in this part than the middle of the thorax, and not half so wide as 
their own length, which is nearly double that of the thorax; sides in front 
parallel, somewhat impressed or substrangulate at the fourth part of their 
length, then slightly and insensibly dilated to two-thirds (more in the 
female), afterwards obliquely and roundly narrowed to the apex, where 
they are conjointly emarginate, with the sutural angle acute and produced ; 
longitudinally depressed along the suture and along the sides, with a dorsal 
convex elevation between these two depressions, highly raised, subcarini- 
form, rugulose, and the margin widely convex, having the stria (9th) cir¬ 
cumscribing the external border of the lateral depression more indicated 
than the others; these are very shallowly punctate ; interstices flat, except 
the dorsal, between the 3rd and 5th striae, and the marginal elevations. 
There is behind the base, inside of the dorsal elevation, which obliquely 
joins it, for it does not extend to the base, a slightly raised tubercle. Lon¬ 
gitudinally, from that tubercle, they are horizontal to the middle, or some¬ 
what raised at that part, thence they very slightly obliquely descend very 
near to the apex, which is more abruptly obliquely slanting, with a trans¬ 
verse depression above it. This depression gives to the end of the dorsal 
elevation, which finishes there, the appearance of an obsolete callosity. 
They are densely clothed like the head and thorax with a whitish, sometimes 
lutescent or flavescent tomentosily, varied with more or less numerous 
black holosericeous maculae, sometimes partly denuded, distributed in two 
longitudinal rows: 1st, one along the dorsal elevation, beginning with 
the basal tubercle (which is black and placed between the 2nd and 3rd 
striae), sinuous, and composed of hardly interrupted maculae alternately 
placed between the 2nd and 3rd, and the 3rd and 4th striae, subquadrate 
(the middle one larger), four on each interstice, connected with each other 
by one of their angles like the squares of a draught-board ; 2nd, a marginal 
one, placed on the convexity between the 9th and 10th striae, composed of 
five distant smaller maculae, of which the first is the callosity of the 
shoulder. 
Pygidium quadrate-subconic, its apical angles obtusely rounded; its 
