Species of the American Genus Astylus. o41 



This insect has extremely rugosely punctured elytra, and two 

 more or less distinct costse on the disc ; the first and second 

 fasciae are usually connected with the dark sutural stripe, and 

 the latter is sometimes dilated at the tip. The females are 

 broader than the males, and some of them (labelled with the 

 MS. name Mecoglossa intermedia in the Fry collection), from 

 Lota, Chilian, &c, have much less coarsely punctate elytra. 

 The long hairs on the under surface are cinereous in colour 

 in the rugose form, and intermixed with black hairs in the 

 smoother examples. The elytral markings are sometimes 

 reduced to two spots on the outer part of the disc, the 

 anterior one being quite small. Females largely preponderate 

 in the long series before me, few of which are labelled with 

 any definite locality. 



2. Astylus gayi. 



Dasytes {Astylus) gayii, Guer. Icon. Regne Anim. p. 48. 

 Mecoglossa affinis, Solier, in Gay's Hist. Chile, iy. p. 427. 

 Dasytes porrectus, Buquet, in Dej. Cat. 3rd edit. p. 123 (1837). 



Hob. CHILE, Valparaiso (C. Darwin), Concepcion, San 

 Bias, Coquimbo (Mus. Brit.), Aiaucania (R. M. Middle/on), 

 &c. 



This insect is a smoother, very hairy form of A. trifasciatus, 

 with the elytral markings usually reduced to three angular 

 patches along the outer part of the disc and the sutural stripe 

 dilated at the base and apex, and the long hairs on the under 

 surface entirely or in great part black. The two forms have 

 precisely similar $ armature, and the smoother females 

 alluded to under A. trifasciatus would be equally well placed 

 under either of them. 



3. Astylus sexmaculatus. 



Dasytes sexmaculatus, Perty, Del. Anim. art. Bras. p. 29, t. 6. fig. 15 ; 



Blanch, in Voyage d'Orbigny, vi. 2, p. 96. 

 Dasytes pictus, Dej. Cat. 3rd edit. p. 123 (1837). 



J . Ventral segment 1 with a blunt hook in the centre at 

 the base ; 5 broadly cleft down the middle, the lateral portions 

 subtruncate at the tip. Terminal segment long, tubulate, 

 narrowing outwards, emarginate laterally at the apex. 

 Tegmen with long, spoon-shaped, slightly sinuous lateral 

 lobes, which are curved inwards at the tip, and thickly 

 fringed with long hairs. Penis-sheath stout, compressed, the 

 outer portion broadly, obliquely truncate, as seen in profile. 



