TOMOCEPHALTTS.— LUDIUS. 499 



Fourteen examples, eight of which are from Chiriqui. Allied to T. abdominalis, but 

 differing from it, apart from colour, in having the thorax a little less elongate, with 

 the sides more rounded at the middle and more sinuate behind. Some of the females 

 are much broader than others, with the thorax more closely punctured. The insect 

 resembles a small Ypsilostethus or Semiotus. A male from Chiriqui is figured. 



6. Tomocephalus insignis. (Tab. XXII. fig. 5, $ .) 



Tomocephalus insignis, Jans, in litt. 



Elongate, robust, rather broad, very shining ; head, antennae, and scutellum black, the head with a reddish- 

 yellow spot in front ; the prothorax rufo-testaceous or rufo-ferruginous, with a transverse black median 

 fascia extending to near the sides, the sides and base in some specimens indeterminately flavous, 

 the basal margin black; the elytra each with a tapering flavous or stramineous stripe on the disc, 

 occupying the entire width at the base, and extending to near the apex, the suture broadly and the sides 

 narrowly, the epipleurse included, black ; beneath black, the presternum, except in front and behind, and 

 the outer portion of the propleurae, flavous, the metasternum at the sides and in front reddish-yellow ; 

 the legs piceous ; above somewhat thickly clothed with long hairs, which are erect on the head and 

 prothorax and decumbent on the elytra, the hairs yellow on the yellow portions and blackish on the other 

 parts, the under surface and legs thickly clothed with fulvo-cinereous hairs. Head rather coarsely, 

 closely punctate ; antennae extending considerably beyond the hind angles of the prothorax, the joints 

 from the fourth widened and serrate, 3 a little longer than 4. Prothorax broader than long, convex, 

 rapidly narrowing from the base, the sides rounded from about the middle forwards and sinuate behind ; 

 the hind angles divergent, moderately long, carinate ; the surface somewhat closely, rather finely punctate, 

 the punctuation becoming finer and more scattered at the base, canaliculate behind. Elytra about three 

 and one-fifth times the length of the prothorax, flattened on the disc, rapidly narrowing from the base, 

 the apices conjointly rounded ; finely, somewhat thickly, confusedly punctate, and with shallow longitu- 

 dinal furrows or obsolete striaa, each of which is indicated, on the flavous portions, by a regular row of 

 coarsish punctures showing through from beneath the surface. Beneath finely and somewhat closely 

 punctate, the prosternum and propleurse with widely scattered coarser impressions. 



Length 13|-15, breadth 3|-4^ millim. ( $ .) 



Hah. Nicaragua (Salle), Chontales (Belt, E. M. Janson). 



Seven examples, probably all females. Very different from any of the described 

 species of the genus. The thorax is more convex than in T. substriatus and its allies. 



LUDIUS. 



Ludius, Latreille, Fam. Nat. Regne Anim. p. 349 (1825) (nee Eschscholtz) ; Candeze, Monogr. 



Elat. iv. p. 294; Cat. Method. Elat. p. 188 (1891) ; Horn, Trans. Am. Ent. Soc. xii. p. 45. 

 Steatoderus, Eschscholtz, in Silb. Rev. Ent. iv. tab. (1836) ; Buysson, Faune Gallo-Rheuane, Elat. 



p. 60 (1894). 

 Crigmus, Leconte, Trans. Am. Phil. Soc. new ser. x. p. 453 (1853). 



This widely-distributed genus contains about sixty-four described species, seventeen 

 of which are American. As adopted here, it also includes Probothrium rufipes and 

 P. physorhinus, Cand., these species differing from Candeze's definition of Probothrium 

 in the gradually declivous (not vertical) mesosternum and the less prominent intercoxal 

 portion of the metasternum ; P. setosum (Germ.) also seems to me to be better placed 

 here. The Central-American species may be separated into three groups by the form 



S32 



