82 ARESCUS. 



occupied l)y a deep concave fovea, which extends a short distance 

 up tlie head ; antenna) black, two basal joints pale fulvous beneath. 

 Thorax transverse-quadi-ate ; sides parallel, straight, curving in- 

 wards and subsinuate at their apex, posterior angles slightly pro- 

 duced backwards, acute ; above smooth and shining, distinctly 

 but distantly punctiu'cd, disc behind the middle impressed with a 

 longitudinal line ; the middle of the apical and the entire lateral 

 margins narrowly edged with black. Scutellum black, smooth 

 and shining. Elytra vAth their sides parallel, narrowly mar- 

 gined ; apex rounded, slightly sinuate, sutural angle acute ; above 

 convex ; each elytron with eleven regular rows of very fine punc- 

 tures, which, however, become confused near the apex, the first 

 row abbrc\iated ; on the surface are a few distant, ftuntly im- 

 pressed irregular lines, closer and more evident at the apex ; on 

 each elytron are four black spots, one on the himieral callus, the 

 tlu-ee others on the disc ; the first of these is placed below the 

 scutellum, the second just before, and the third transverse, imme- 

 diately beliind the middle. Beneath pale fulvous ; outer edge of 

 tibite black, apex of tarsi pitchy ; under surface of frontal horn 

 smooth, concave. 



B. A. black : horn, antennae at their base beneath, elytra and abdo- 

 men pale fulvous. 



Hah. Ecuador. 



Collections of W. W. Saunders, Esq., and J. S, Baly. 



3. Arescus Mstrio, n. sp. Tab. VI. Fig. 8. B.M. 



A. elongatus, convexus, varicolor ; antennis, tibiis extrorsum tarsis- 

 que nigris. 



Mas. Cornu froiitali apice dilatato. tnincato, fronte excavato, ru- 

 goso ; thorace transverso-quadrato, lateribus dente parvo armatis ; 

 elytris postice creta elevata obliqua instructis. 



Foem. Fronte excavato, rugoso, comu ad apicem angustato, ob- 

 tuse truncate ; thorace subquadrato ; elytris postice non elevatis. 



A. Corpus fulvum. 



B. Corpus fulvum ; scutcllo elytrorumque pimcto nigris. 



C. Corpus flavum aut inifo-fulvum ; el}i;ris basi exceptis abdo- 

 mineque nigris. 



D. Corpus fulvum ; thoracis vittis duabus elytrisque nigris, his 

 apice fulvis, macula rotundata nigra. 



E. Corjjus rufo-fulvum ; elytris plaga magna communi nigra. 



F. Corpus nigrum ; fronte elytrorumque fasciis fulvis aut flavis. 

 Long. 0-7 lin. 



A . elongate, convex ; antennae, outer edge of tibiae and the tarsi 

 black ; rest of the body varying from pale fulvous to nearly en- 

 tirely black. 



M<(le. Frontal horn (Tah. III. fig. 38) broad, sKghtly dilated 

 towards the apex, the latter truncate ; between the eyes is a large 



