HOEISTONOTUS. 435 



mixed scattered moderately coarse punctures, which become more distinct towards the sides and apex and 

 do not extend to the basal portion of the disc ; the base sinuate and deeply bi-incised on either side. 

 Elytra about two and two-thirds longer than the prothorax, and of the same width at the base, feebly 

 rounded at the sides, widest at about one-third from the base, and narrowing thence to the apex, the 

 humeri rather prominent in front ; deeply punctate-striate, the interstices feebly convex, flatter towards 

 the suture, and sparsely punctate. Beneath closely, very finely punctate, with scattered coarser punctures, 

 these latter coarser on the metasternum and first ventral segment than on the other parts. Claws 

 rectangularly dilated from the middle to the base. 

 Length 6-8|, breadth 2-3 millim. ( rf $ .) 



Hab. Mexico, Cerro de Plumas, Jalapa (Hoge), Orizaba (coll. Janson), Temax in 

 North Yucatan (Gaumer); Guatemala, Chinautla (Salvin), Duenas, San Geronimo 

 (Champion). 



Thirteen examples, varying greatly in size. This insect resembles H. obliteratus, 

 but differs from it in having the base of the thorax deeply bi-incised on either side ; 

 the larger intermixed punctures on the thorax are also much finer, and the elytra are 

 more rounded at the sides. The simple fourth joint of the tarsi separates it from 

 Esthesopus hepaticus and its allies. 



12. Horistonotus mixtus. 



Elongate, moderately convex, feebly shining, sparsely clothed with fine yellowish-cinereous pubescence; 

 piceous, the antennae and legs testaceous. Head finely punctured, with numerous coarse punctures inter- 

 mixed ; antennas slender, extending slightly beyond the humeri in the female, a little longer in the male. 

 Prothorax slightly broader than long, not very convex, moderately rounded at the sides, not much wider 

 at the base than at the apex, narrowing a little behind ; the hind angles rather short ; the surface closely, 

 finely punctate, with scattered, very distinct, coarse punctures intermixed ; the base sinuate and bi-incised 

 on either side. Elytra two and two-thirds longer than the prothorax, and a little wider than it at the 

 base, slightly rounded at the sides, narrowing from the middle, the humeri rounded ; deeply punctate- 

 striate, the interstices feebly convex and somewhat thickly punctured. Beneath closely, very finely 

 punctate, with intermixed coarser punctures, the latter becoming very conspicuous on the propleurae. 

 Claws broadly rectangularly dilated from the middle to the base. 



Length 6j§-8£, breadth 2|-2§ millim. ( <J $ .) 



Hab. Mexico, Vera Cruz, Yolos in Oaxaca (Salle). 



A male from Yolos and a female from Vera Cruz. Allied to H duplicatus, but 

 more sparsely pubescent, less densely punctured, and more shining ; the intermixed 

 punctures coarser and much more distinct, those on the propleurse especially, the 

 antennee longer, the elytra more rounded at the sides, the thorax less narrowed behind. 

 The female is much smaller than the male, and has more obtuse hind angles to the 

 prothorax. 



13. Horistonotus rotundicollis. 



Elongate, robust, moderately shining, sparsely clothed with fine yellowish-cinereous pubescence ; piceous, 

 the antennas ferruginous, the legs ferrugineo-testaceous. Head coarsely but shallowly umbilicate- 

 punctate, with a few fine punctures intermixed, the eyes large and smooth ; antennas slender, extending 

 to a little beyond the humeri. Prothorax convex, considerably broader than long, very little wider at the 

 base than at the apex, the sides strongly rounded from the middle forwards and obliquely converging 



3K2 



