OMOTYPHUS. 471 



the former is " coarsely rugose-punctate/' not granulate ; the thorax is nearly as deeply 

 punctured, and has two raised longitudinal tubercles placed near the anterior margin, 

 as Clark describes in his 0. fuliginosus, which he compares to 0. tuberculatus, although 

 he has not described any species under that name in the present genus. 



3. Omotyphus tibialis. 



Ovate, subdepressed, fulvous or ferruginous, clothed with yellow pubescence ; thorax subquadrate, with three 

 longitudinal yellow bands ; elytra finely punctate- striate, marked with alternate yellow and fulvous narrow 

 longitudinal stripes. 



3 . The posterior tibia? strongly curved, with an acutely raised marginal ridge. 



Length 2 lines. 



Head rugosely punctured, clothed with yellow pubescence ; antennae half the length of the body, entirely fulvous, 

 the third and the two following joints of equal length, the rest shorter ; thorax scarcely broader than long, 

 finely and closely punctured, fulvous, the golden-yellow pubescence forming a lateral and a central longi- 

 tudinal band; elytra broader than the thorax, the basal portion rather strongly raised, finely punctate- 

 striate, the punctures placed in sinuate, not straight lines, the interstices alternately fulvous (or covered 

 with golden yellow pubescence, producing the effects of narrow longitudinal bands) ; posterior tibiae of the 

 male curved and deeply longitudinally channelled, and their apices armed with a double spur, those of the 

 females straight ; palpi filiform. 



Bab. Guatemala, San Geronimo (Champion). 



When the insect is viewed sideways the pubescent yellow elytral stripes, followed by 

 the fulvous smooth spaces, can be seen more plainly ; seen without a lens from above 

 the elytra appear obsoletely spotted, the spots forming two oblique transverse rows ; 

 the male of 0. tibialis is well distinguished by the curved, deeply channelled and 

 acutely margined posterior tibiae. 



4. Omotyphus maculipennis. 



Black ; closely pubescent ; palpi filiform ; antennae fulvous, the seventh and the eighth joints and the apical 

 one fuscous or black ; head with three longitudinal carinations ; thorax granulate, bituberculate ; elytra 

 finely punctate-striate, black, spotted with ashy grey. 



Length 2 lines. 



Head finely granulate, fuscous or piceous, with some golden-yellow pubescence ; above the antennae with a 

 central and a lateral short ridge, not extending to the base ; the space between the antennae with a sharply 

 raised keel extending down to the clypeus ; antennae half the length of the body, slender, the terminal 

 joints not incrassate, the third joint longer than the fourth, the basal joint piceous above, the five following 

 joints fulvous, the next two piceous, the ninth and tenth fulvous, the terminal joint fuscous ; thorax at 

 least twice as broad as long, short, the sides straight, the surface with two slightly raised tubercles near 

 the anterior margin, finely granulate, the sides depressed anteriorly and near the base, thickly clothed 

 with brownish fuscous pubescence, the sides with a more or less distinctly marked golden yellow stripe ; 

 elytra with the base slightly raised, finely punctate-striate, clothed (the punctures as well) with thick 

 blackish pubescence and variegated with small whitish grey spots placed in three or four transverse rows 

 of very irregular shape, the interstices slightly convex, a well-marked depression is placed below the base, 

 and a much more obsolete one below the middle close to the suture; below and the legs piceous, clothed 

 with silvery-grey pubescence. 



Hab. Panama, Volean de Chiriqui (Champion). 



In the coloration of the elytra, 0. maculipennis seems to be allied to 0. crassicornis, 

 Harold, from Bogota, from which it evidently differs by the sculpture of the head, the 



