Species of the. American Genus Astylus. 357 



27. Aslijlus quudrilineatiis. 



Dasytes quadrilineatus, Germ. Ins. Spec. nov. p. 76 (1825) ' ; Blanch, 

 in Voyage d'Orbigiiy, p. 98 « ; Cast. Hist. Nat. Col, i. p. 281 \ 



(J. Antennae wlioU}' or in ])jiit vufo-testaceouis, moderately 

 long, considerably longer than in ? . Elytra more or less 

 sinuate at the tip, and with the sutural angles almost as 

 acute as in ? . Ventral segment 5 deep!}' arcnato-cmarginate, 

 6 barely as long jis 5, subconical, feebly notched at tip. 

 Tegmen more or less emarginate or bilobed, and clothed with 

 long blacki.sh hairs at apex. Penis-sheath gradually nar- 

 rowed or acuminate at tip. 



? . Ventral segment 5 feebly emarginate, 6 short. 



H<ih. Brazil' ■, Santa Catharina [ex coll. Fry : $ ), Rio 

 Grande ; Ukuguay, Maldonado*, Monte Video [C. Darwin) ; 

 Argentina (0. IT. Thomas), Santa Fe and Bahia Blanca 

 (0. Darwin), Buenos Ayres^; Patagonia 2. 



A variable insect, if the specimens before me all belong to 

 one species. The reddish or flavescent marginal and dis- 

 coidal vittae of the elytra are sometimes coalescent at the 

 tip and the discoidal one may be reduced to a narrow incom- 

 plete line. Four males have been dissected, showing some 

 variation in the form of the tegmen, which in a large example 

 from Buenos Ayres has a short lobe on each side at tip. 

 Two small males from Monte Video, with the sutural angles 

 of the elytra obtuse and the tegmen rounded at apex, may 

 belong to a different species? The length varies from 

 6—9 mm. The general colour may be bluish-green, green, 

 nigro-caeruleous, or brassy. 



28. Astylus correptus, sp. n. 



Elongate, moderately broad, shining, nigro-pilose, with 

 short, adpressed, cinereous hairs intermixed ; black, the 

 elytra (the humeri, basal [)ortiou of the suture, and apical 

 margin excepted) brown ; closely, minutely, the elytra finely, 

 irregularly punctate. Head hollowed on each side anteriorly ; 

 antenna strongly serrate, short in ?,a little longer in (^ . 

 Prothorax broader than long, narrowed anteriorly in both 

 sexes, hollowed in the middle at the base. Elytra long, 

 costate laterally to near the apex, and obsoletely bicostate on 

 the disc ; in (J somewhat rounded at the sides, and with the 

 apical portion narrow and considerably produced ; in ? sub- 

 parallel to near the tip, and with the humeri much swollen. 



(?. Anterior tarsi with joints 2 and 3 obliquely dentate 

 and 4 augulate, and the intermediate tarsi with joint 3 



