58 [August, 



NEW SPECIES OE ACAKTHODERES (COLEOPTERA, LONGICORNIA, 

 FAMILY L AMI ABM). 



BY H. W. BATES, E.L.S. 



The genus Acanthoderes is interesting from its peculiar geo- 

 graphical distribution. Having its head quarters in Tropical America, 

 a few outlying species are found in Western Africa, and in the tem- 

 perate zones of North America, Asia, and Europe. The chief European 

 representative is the well-known A. varius, which seems to stand in the 

 relation of a " synthetic " type to the divergent and wonderfully-varied 

 specific forms, undoubtedly congeneric, which abound in South America. 



Acanthoderes yetustus. 



Elongato-oblongus, sub-depressus, rufescenti-fuscus, elytris litura circumflexa 

 pone medium, guttisque numerosis, atro-fuscis ; lineis obliquis (quarum duabus 

 utrinque angulariter dispositis prope basin, alteraque angulari prope apicemj 

 guttisque apud suturam et latera, cinereis ; thorace tuberculis dorsalibus (duobusj 

 lateralibusque validis, his cinereo-cinctis : elytris cristis basalibus serratis, carina 

 dorsali nulla ; dorso sparsim punctatis, apice sinuatim transverse truncatis, angulo 

 suturali prominulo, exteriori spiniformi : antennis corpore multo longioribus, articulis 

 3 — 6, cinereo-biannulatis, 7 — 11, basi cinereis : tarsis rufescenti-cinereis, posticis 

 angustis, articulo primo elongato. Long. 6 — 85 lin., $ . 



South Brazil and Ecuador (Macas, Buckley). Belongs to a group 

 of species of similar elongated form and variegated markings, which 

 have slender hind tarsi and rather narrow mesosternum. 



Acanthoderes longit arsis. 



Yalde elongatus, convexus, rufescenti-fuscus, nigro-punctatus, lituraque circum- 

 flexa elytrorum pone medium nigra : thorace tuberibus validis: elytris medio longi- 

 tudinaliter costatis, tuberculis parvis acutis asperatis, apice truncatis et utrinque 

 cequaliter bidentatis : tarsis fulvis, posticis articulo primo gracili, quam 2 et 3 con- 

 junctis multo longiori. Long. 12| lin., £. 



Ecuador (from the Saundersian collection) . In this species, the 

 length and slenderness of the first joint of the hind tarsi reaches its 

 maximum. The elytra have no trace of the cinereous lines which dis- 

 tinguish A. vetustus ; the antennae are ringed with cinereous or fulvous 

 in a similar manner in all the allied species. 



Acanthoderes satanas. 



A. Swederi proxime ajfinis at major, prcecipue robust ior. Latissimus, niger, 

 opacus ; capite (prope labrumj maculis duabus minutis, thoraceque lateralibus 

 duabus fere obsoletis, flavis : elytris apice rotundatis, maculis flavis utrinque 

 duabus (altera suturali altera laterali) , guttis duabus ad basin , alterisque (duabus vel 

 tribus) sub-obsoletis ad apicem : pedibus validissimis nigris, tarsis latis, articulis 

 3 et 4; fulvis : pectore immaculato. Long. 8 lin., $ . 



Chanchamayo, Peru (Thamm). 



