12 



Inhabits South America. In the cabinet of the Entomological So- 

 ciety of London ; taken by Mr. Darwin at Valparaiso. This little 

 longicorn, which a good deal resembles a small brown spider, is very 

 closely allied to the genera Compsosoma and Eusphaerium, but ap- 

 pears to me sufficiently distinct from both. 



Genus. — Xylotoles, Netvman. 



Caput pronum; antennae corpore longiores, graciles, ll-articulatse : 

 prothorax fere cylindraceus, capite triplo longior, lateribus rectus : ely- 

 tra lateribus convexa, apice acuta: pedes mediocres, femoribus tumidis. 



Xylo. lentus. Testaceo-fuscus : scutellum cinereo-lanuginosum, 

 spatio mediano glabro : utrumque elytron maculis oblongis 6 

 obscure flavido-lanuginosis signatum : elytra obsolete 10-striata, 

 stria suturali caeteris distinctiori ; versus elytrorum basim punctis 

 nonnullis magnis profundis prave dispositis. (Corp. long. •4unc. 

 lat. '15 unc.) 



Inhabits New Zealand. A specimen in the cabinet of the Entomo- 

 logical Society of London was taken by Mr. Darwin. 



Genus. — Megacera, Serville. 



Mega, parvula. Antennae corpore duplo longiores : prothorax ca- 

 pite angustior : puncta, elytrorum punctis profundis vix in ordi- 

 ne dispositis : testaceo-fiisca, vittis 6 luteis capite prothoraci 

 elytrisque communibus. (Corp. long. '3 unc. lat. '04 unc.) 



Inhabits South America. A specimen in the cabinet of the Ento- 

 mological Society of London, was taken by Mr. Darwin at Bahia. It 

 differs but slightly from Megacera macrocera of Serville, except in 

 size, being scarcely more than a seventh part as large ; the little pro- 

 jections on which the antennae are situated are less prominent than in 

 that species, and the extremities of the elytra less pointed and less di- 

 varicating. 



Genus. — Saperda, Fahriciiis. 



Saper. cana. Nigra, lanugine cana tecta: elytrorum linea suturali 

 et marginali, sterno, abdomineque albidis. (Corp. long. '4 unc. 

 lat. '1 unc.) 



Inhabits North America. Two specimens in the cabinet of the En- 

 tomological Club, were taken by Mr. Doubleday at St, John's Bluff, 

 East Florida. 



