ARESCXTS. 81 



A. Pallide fiilvi;s ; tibiis. tarsis, scutello, elytronimque linea 

 marginali, nigris. 



B. Prsecedenti simillimus, sed utroque elytro maculis duabus 

 nigris, his ssepe communis, faseiis duabns formantibus. 



C. Pallide fiilviis ; capite, thoracis macula, elytronimque linea 

 marginali nigris. 



D. Pallide fulvus ; scutello, elytrorum vittis duabus, una dis- 

 coidali, altera mar>?inali, tibiis tarsisque nigris. 



E. Niger ; elytris pallide ful^-is, utrisque linea marginali macu- 

 lisque duabus, his interdum communis, nigris. 



Arescus quadrimaculatus, SalU, Ann. de la Soc. Ent. de France, t. vii. 

 p. 435. pi. 13. fig. 5, 5 a. 



Long, nude, 7-8 lin. ; female, 5-|-7 lin. 



Frontal horn (Tab. III. fig. 36) acute in both sexes, concave above. 

 Thorax subquadi'ate ; sides straight and parallel ; above smooth, 

 longitudinally grooved behind, anterior half deeply excavated. 

 El}i;ra in the male with the shoulders elevated into a large, in- 

 crassate, longitudinal ridge ; each elytron produced at the apex 

 into a spathulate tail ; sutiu'al angle armed AAath an acute tooth ; 

 sui-face punctate-striate, space witliin the humeral ridges irregu- 

 larly punctured ; parallel with the sutiu'e are several distinctly 

 elevated costse ; female with the elytra simj)le. 



Hah. Venezuela. 



British Mnseum and most collections. 



The sexes differ so greatly in foiin as to have been described as 

 distinct species. Their colouring, more especially that of the male, 

 is so exceedingly variable, that it is quite impossible to fix on the 

 typical colour. I have only indicated above, a few of the most 

 striking difierences, but possess in my own cabinet fifteen diff'erent 

 varieties of the male and twelve of the female. 



b. Antennarum articulo basalt obovato, aiiice in laminam compressam 



producto. 



2. Arescus separatus, n. sp. 



A. late elongatus, convexus ; coniu frontali lato, truncato, supra et 

 infra excavato ; elytris tenuiter punctato -stria tis, punctis ad api- 

 cem confusis. 



A. Fulvus ; antennis, thoracis apice latcribusque, scutello, ely- 

 trorum punctis tibiisque extrorsum, nigiis. 



B. Niger; cornu, antennarum basi infra, elytris abdomineque 

 fulvis. 



Long. 6i lin. 



A. A. fulvous ; head smooth, frontal horn (Tab. III. fig. 37) broad, 

 narrowed from base to apex, truncate, upper surface entirely 



G 



