Species of the American Genus Astylus. 351 



related to, and perhaps a form of, the Peruvian A. nigro- 

 f em oralis t Pic*, which is said to have the elytra luteo- 

 trilineate at the base and luteo-maculate at the apex. The 

 last-named species is compared by him with A. pallipes, 

 Kirsoh, from Ecuador. The longer head (especially in ? ), 

 rufo-testaceous tibise and tarsi, less coarsely punctured elytra, 

 &c, separate A. luteicauda from A. riveti, Bourg. in all its 

 varieties. The (J -armature is very similar in the two forms. 

 A. (Dasi/tes) xanthurus, Blanch., from Maldonado, also has 

 a yellowish tip to the elytra. 



18. Astylus variegatus. 



Dasytes variegatus, Germ. Ins. Spec. nov. p. 77 (1824) ; Cast. Hi3t. 



Nat. Col. i. p. 280 2 ; Blanch, in Voyage d'Orbigny, p. 97 \ 

 Astylus variegatus, Redt. Reise Novara, ii. p. 109 *. 

 Astylus variegatus, Germ., var. notatus, .Pic, L'Echange, xvii. p. 36 



(1902) 5 . 

 ? Astylus atromaculatus, Blanch., var. revoili, Pic, L'Echange, xvii. 



pp. 35, 36 (1902) G . 



Var. Larger, the head and prothorax black, the elytra 

 reddish, with the black median patch curving downwards 

 posteriorly and coalescent with the sutural stripe; all the 

 tibiae more or less curved in <y . 



$. Anterior and intermediate tibise curved. Ventral 

 segment 5 broadly arcuato-emarginate, 6 conical, undivided, 

 deeply, triangularly notched at tip. Tegmen with very 

 long, somewhat spoon-shaped lateral lobes, which are flavo- 

 ciliate along their lower margin and at the apex. Penis- 

 sheath stout, acuminate at apex. 



$ . Ventral segment 5 feebly emarginate, 6 transverse. 



Hab. Brazil 12i % Rio de Janeiro 36 , Minas Geraes, 

 Pernambuco, JSao Paulo, Rio Grande ; Paraguay, Snpucay 

 (W. Foster); ARGENTINA, Corrientes 3 . 



Apparently an abundant insect in many parts of Brazil, 

 especially about Rio de Janeiro, and often found gregariously 

 on flowers. The larger and darker form (? revoili, Pie) has 

 the lateral lobes of the (£ -tegmen rounded at the lip (not. 

 incurved and truncate as in A. atromaculatus), and shaped as 

 in A. variegatus. The head and prothorax are usually 

 metallic in the latter. The subapical spot on the elytra is 

 sometimes obsolete, sometimes (var. notatus) united with the 

 one on the opposite elytron into a common transverse patch. 



* Melanges exot.-entoin. xii. p. 8 (Jan. 1915). 



