ADDENDA. . 343 
regularly placed below the middle, the interstices at the apex subrugose, the sides sparingly clothed 
with yellowish hairs, the disc with two obsolete depressions placed transversely below the middle, and 
a less distinct one below the base near the suture; underside and legs finely pubescent. 
Hab. Mexico, Omilteme in Guerrero (H. H. Smith). - 
This may be readily known from all the other species of Crioceris from our region by 
its shining black colour. Two specimens. 
MASTOSTHETUS (p. 19, and Suppl. p. 57). 
22 (a). Mastosthethus angusto-vittatus. 
Fulvous, the antennz, a spot on the vertex, and two or three spots on the thorax, black; elytra flavous, not 
very closely punctured, the suture and a narrow submarginal stripe, as well as a spot at the middle of 
the base, black; tibie and tarsi black. 
Length 42 lines. 
Q. Head reddish-fulvous, rugosely punctured near the eyes, the middle of the vertex with a black spot, the 
labrum and palpi black; antenne extending to the base of the thorax, black, the lower four joints 
shining, the others opaque, transverse; thorax twice as broad as long, very sparingly punctured anteriorly, 
the posterior angles slightly produced outwards, the anterior transverse sulcus distinct at the sides, the 
posterior one indicated by a deep fovea at the angles, the surface fulvous, the anterior margin narrowly 
and three spots on the disc (one median and two lateral) black ; scutellum black ; elytra sparingly clothed 
with yellowish hairs, distinctly but not closely punctured, with a narrow sublateral stripe (commencing at 
the base but not quite reaching the apex), the suture very narrowly, and a spot at the middle of the base, 
black ; underside reddish-fulvous, clothed with long yellowish hairs, a spot at the sides of the breast black ; 
the base of the femora, the tibiee, and tarsi black ; metasternum triangularly raised in front. 
Hab. Mexico, Omilteme in Guerrero (H. H. Smith). 
In the male insect the thoracic spots are smaller and the median one is obsolete, 
and the posterior tibiz are fulvous and broadly sulcate. Two specimens. 
MEGALOPUS (p. 26, and Suppl. p. 64). 
4, Megalopus basalis. 
Black, clothed with greyish pubescence ; the head closely, the thorax sparingly punctured ; elytra very strongly 
and irregularly punctate, black, the base with a triangular red patch covering the shoulders. 
Length 44 lines. 
Of nearly parallel shape, flattened above; the head closely punctured at the sides, leaving a narrow longitu- 
dinal space in the centre smooth, the eyes deeply notched, the labrum edged with a fringe of fulvous 
hairs; antenne black, extending to the base of the thorax, the lower four joints shining, the others 
opaque, transversely widened, the third joint very long and slender ; thorax one-half broader than long, 
narrowed in front, the sides straight, the surface very sparingly punctured, with a rather well-marked 
transverse groove behind the anterior margin and an obsolete one near the base; scutellum obscure 
fulvous ; elytra slightly depressed below the base at the suture, very strongly punctured, rather sparingly 
clothed with long greyish pubescence, black, with a red triangular patch at the shoulders, extending to 
the scutellum and downwards to about one-fourth from the base; underside and legs more closely 
covered with grey pubescence ;.posterior femora moderately thickened, not extending to the end of the 
abdomen ; tibie rather curved. 
Hab. Muxico, Tepetlapa in Guerrero (H. H. Smith). 
Of this very distinct species three specimens (apparently representing both sexes) 
were obtained. up 
