CKYPTOCEPHALUS. 43 



4. Cryptocephalus gemellatus. 



Cryptocephalus gemellatus, Suffr. Monogr. vi. p. 292, xii. p. 364. 



Yellow above ; head with three, thorax with four spots ; elytra geminate punetate-striate, yellow, each 



elytron with two longitudinal bands ; underside black, spotted with yellow. 

 Length 2| lines. 



Hab. Mexico, El Mirador. 



Closely allied to the preceding species, but principally distinguished by the want of 

 the third elytral vitta. 



5. Cryptocephalus semimarginatus. (Tab. III. fig. 3.) 



Cylindrical, black and yellow below, above light yellow, three central and two lateral spots, as well as the 

 margins of the thorax, black ; elytra geminate punetate-striate, each elytron with two longitudinal vittae 

 and the sutuTal and lateral margins black. 



Length 2| lines. 



Head with a few deep punctures at the middle, yellow, extreme vertex, a short longitudinal central line, and 

 a spot at the base of the antennae at each side black ; antennae black, the second and third joints obscure 

 fulvous or flavous ; thorax with acute and elongate posterior angles and a short oblique depression in 

 front of the latter ; surface finely and distantly punctured, yellow, shining, the posterior margin narrowly 

 black, two triangular spots at the middle of the disk, a short transverse streak in front of the base, 

 sometimes divided into two spots, and a semicrescentiform narrow longitudinal band at each side, nearly 

 touching the base, black ; scutellum black, with a basal groove ; elytra slightly narrowed behind, mode- 

 rately deep punetate-striate, the punctures running parallel and in pairs, the first pair united at the end 

 near the suture, the third pair widened anteriorly, the lateral margin accompanied by a deep and 

 regular single row of punctures, interstices finely transversely rugose, sutural and the posterior half of 

 the lateral margin, as well as two vittae, black, the first of these latter is situated between the second pair, 

 the second between the third pair of striae, neither of them touching the base or the apex of the elytra ; 

 underside and legs black ; sides of the breast and the space between the legs yellow. Female with a deep 

 circular groove at the last abdominal segment. 



Hab. Mexico, Oaxaca {Salle). 



Five specimens of this species from Mexico are before me. They show no material 

 difference except in the punctuation of the thorax, which in one of them is almost 

 absent ; the markings of the latter part do not allow this species to be united either with 

 C. altemans or C. gemellatus. Another peculiarity is the colour of the anterior and 

 outer part of the lateral elytral margin, which remains of the ground-colour in all the 

 specimens, the posterior part being black only, while the inner one at the underside is 

 black throughout ; the present species would seem to be most nearly allied to C. gemel- 

 latus. Besides the above noticed difference, the punctured striae of the elytra, which 

 are distinctly visible to the end, while they are obliterated in C. gemellatus, will help to 

 distinguish the two insects. 



6. Cryptocephalus flavonotatus. 



Cryptocephalus flavonotatus, Suffr. Monogr. vii. p. 1 ; Sturm, Cat. 1843, p. 302. 



Yellow; thorax with a bilobed central rufous spot; elytra closely and coarsely punctured, with three sinuate 



rufous transverse bands, below brown and yellow. 

 Length 3| lines. 



Hab. Mexico. 



g2 



