CHLAMYS. 85 



30. Chlamys insidiosa. 



Chlamys insidiosa, Lacord. Mon. p. 778 \ 



Hah. Mexico \ 



This is a species comparatively easy to recognize, on account of the black bands of the 

 thorax and the sharp, thin, and regular ridges of the elytra ; the latter are also very 

 closely and finely punctured. 



31. Chlamys clarkL. 



Subquadrate, rufous ; head finely, thorax granulate punctate ; elytra deeply punctured, each elytron with four 

 longitudinal costae, the first and second and the third and fourth connected with each other by a transverse 

 branch. 



Length 1| line. 



Head flat, very finely punctured; antennae rufous, the last five joints black ; thorax much broader than long, 

 with a rather high and rounded elevation, the sides of which are deeply constricted or grooved, while the 

 top is but obsoletely channelled ; each side of the thorax near the base also distinctly swollen ; surface 

 deeply punctate and granulate, especially at the top of the elevation, where a sharp ridge is visible at each 

 side of the channel ; scutellum impunctate ; elytra two and a half times as long as the thorax, deeply punctate 

 throughout, each elytron with the following raised lines or costae : — the first, subtuberculate at its base and 

 end, from the base to the middle of the elytron, parallel with the suture ; the second from the middle of 

 the base, where it commences with a tubercle, to nearly the apex, at which place it has considerably 

 approached the suture ; this line is joined to the first and third by a transverse branch before and at the 

 middle ; the third line runs parallel with the second to the middle of the elytron, where it terminates, or 

 rather is lost, in the network at the apex ; the fourth line is placed close to the lateral margin, and joins 

 the third at its end by a rather large and distinct transverse costa ; near the apex of the elytra four or 

 five small tubercles are also visible; pygidium closely punctured or finely reticulate, with a smooth central 

 ridge ; prosternum greatly narrowed posteriorly. 



Hah. Mexico, Cordova {Salle). 



Although this is another closely allied species to C. granulicollis, C.pohlii, and several 

 others of this group, the distinct and more numerous transverse branches of the elytral 

 costEe will help to distinguish the present, although the determination will not be 

 always easy to follow where the insect shows variation. 



32. Chlamys fasciaticollis. (Tab. V. fig. 7.) 



Subquadrate, narrowed behind, black ; head, part of the margins, and two oblique longitudinal bands at the 

 thorax fulvous ; elytra deeply punctate, each elytron with nine or ten tubercles placed longitudinally 

 underside, pygidium, and legs bluish black, variegated with fulvous. 



Length lf-2 lines. 



Head finely and closely punctured, fulvous, with a triangular black spot at the vertex ; antennae rather long, 

 fulvous ; thorax nearly three times as broad as long, with a rounded and very moderately elevated hump, 

 the latter with a shallow central channel near the base and two short acute ridges at the top of the 

 elevation ; entire surface closely punctured, finer at the sides than towards the middle, fulvous, with two 

 broad irregular-shaped lateral bluish-black bands and a narrow central one, all united at the base into a 

 transverse patch ; another round spot is situated at each side and attached to the lateral bands ; elytra 

 narrowed behind, the surface closely and deeply punctured, the punctures somewhat arranged in regular 

 rows near the suture, each elytron with the following isolated tubercles — five, of which the middle one is 

 placed transversely, parallel, and close to the suture, one transverse tubercle at the middle of the lateral 



