Species of the American Genus Astylus. 355 



and fringed with long hairs at the tip. Penis-sheath stout, 

 abruptly acuminate and hooked at the apex. 



? . Ventral segment 6 short, simple. 



Ilab. Brazil 12 , Rio de Janeiro 3 , Santa Catharina, Bahia. 



The seventeen examples of A. cyanerythrus before me 

 (13 ? ?,± <?<?), belonging to the British Museum, or to 

 the Hope Collection at Oxford, vary greatly in size (length 

 4^-10, breadth 2^-5^ mm.), and to some extent in colour. 

 The two black patches on the disc of the prothorax are often 

 transversely confluent, and the dark coloration sometimes 

 extends over the whole dorsum, or leaves the basal margin 

 only red; and the reddish submedian and subapical fasciae on 

 the elytra are very narrow in some examples, and not con- 

 nected along the suture, differing in this respect from Perty's 

 figure. Three of the specimens at Oxford are labelled with 

 the MSS. names annulatus, K., longicornis, K., and speciosus 

 respectively. A normal large $ (speciosus in Mus. Oxon.) 

 has been dissected for examination of the mouth-parts and 

 genital armature. It is possible that the smaller, darker, and 

 more opaque form, also from Rio de Janeiro, may prove to 

 be distinct? The synonymy quoted refers to the larger 

 insect. 



25. Astylus jatahy en sis. 



Astylus jatahyensis, Pic, L'Echauge, xvii. p. 35 (1902). 

 Astylus jatahyensis, var. armitagei, Pic, Melanges exot.-entoru. xii. 

 p. 8 (Jan. 1915). 



Moderately elongate, rather convex, shining, the elytra 

 duller, clothed with erect, black bristly hairs intermixed with 

 scattered cinereous pubescence, the vestiture of the under 

 surface long, cinereous ; black, the antennae in great part, 

 the prothorax with the entire margin, the elytra with the 

 sutural and outer margins and a narrow !-shaped streak 

 running down the middle of the disc to near the apex, the 

 coxas, and legs (the tarsi, posterior femora, and posterior 

 tibiae in part excepted) testaceous ; the head closely, the 

 prothorax rather sparsely punctured, the elytra irregularly 

 asperato-punctate, with the interspaces alutaceous. Head 

 rather short and broad, arcuately impressed in front ; antennae 

 moderately long. Prothorax transversely convex, hollowed 

 in the middle at the base, shallowly sulcate posteriorly. 

 Elytra not very long, parallel, with or without two feeble 

 costal on the disc, the apices narrow, rounded. 



(J. Ventral segment 5 feebly arcuato-emarginate, 6 short, 

 triangularly notched at apex. Tegmen truncate at tip. 

 Penis-sheath acuminate. 



26* 



