340 Mr. G. C Clinmpion on variotis 



h\ Elvtral apices sinuato-truncate and sutural 

 angles sharp in c? $ * : <S with emarginate 

 tegnien and acinuinnte penis-sheath , . , . No. 27. 

 a^. Elytra constricted posteriorly in c? , subparallel 

 in $ , sharply costate laterally in both sexes : 

 J with joints 2 and 3 of anterior tarsi pro- 

 duced at inner apical angle, the tegmen 

 rounded at tip, and the penis-sheath acumi- 

 nate No. 28, 



</'. Terminal abdominal segment with a long process 

 on each side in (^ ? the tegmen truncate, and the 

 penis-sheath acuminate ; elytra bicostate, the 



inner costa prominent No. 29. 



b'. Wings wanting or rudimentary ; elytra not costate : 

 J with joints 2 and 3 of anterior tarsi produced 



at inner apical angle No. 30. 



b. Metasternum bituberculate or bidentate in r? ; elytra 

 uni- or bicostate ; wings fully developed : J with 

 tegmen truncate or feebly emarginate and penis- 

 sheath acuminate, 

 c'. Elytral apices rounded or truncate in (5 , bispinose 



and deeply emarginate iu § , . . . . Nos. 31-36. 



d'. Elytral apices rounded or subtruncate in (^ , sinuato- 

 truucate, and with the sutural angles sharp and 

 overlapping, in $ Nos. 37-39. 



1. Asti/his trifasciatu.''. 



Dasytes (Astylus) trifasciatus, Gu^r. Icon. Regne Anim. p. 48, t. 15. 



figs. 2-2 c ; Redt. lieise Novara, ii. p. 109. 

 Mecuglossa ruf/osu, Solier, iu Gay's Hist. Chile, iv. p. 420, t. 10. 



%s. 5-5 g. 



(J. Ventral sutures 1-4 oblique tioui the outer margin to 

 median line; segment 1 with a stout hook in the niidt.ile at 

 the base; segment 5 long, divided into two, widely separated, 

 apically convergent lobes, which are broadly subtruncate at 

 the ti]), the median |)ortion inenil)ianous. Terminal segment 

 elongate on tlie dorsal a.'^pect, transver.se on the ventral 

 aspect, angulate on each side towards the apex beneath, the 

 apical portion dilated laterally into a broad, vertical, inwardly 

 concave, securiform lobe, and the apical margin toothed in 

 the centre above. Tegmen with moderately long, ciliat<', 

 feebly curved, lateral lobes, which are sid)triincato or bluntly 

 rounded at the tip. Penis-slieath very strongly, bisinuately 

 curved, ia})ering at the tij). 



? . Vential segment 6 about as long as 5, cleft, and 

 separated laterally from the dorsal portion. 



Hob. Chile. 



Apparently a comnon bpecies in some jjarts of Chile. 



* Possibly a variable character in this species, A. quadrilineatut. 



