species of the American Genus Astjlus. 347 



b}' the transverse reddish basal spot and the entirely bluish- 

 black outer margin of the elytra. The ^ has a similarly un- 

 divided sixlh ventral segment ; but the lateral lobes of the 

 tegmen are shaped much as in the same s(ixo( A.cceruleotinctus, 

 which has an incompletely cleft sixth ventral segment in rj . 

 The above-mentioned colour differences also distinguish 

 ^4. iiigroVimhatus from the last-named insect, the outer limb 

 of the el} tra being j)artly fiavescent or red in all the speci- 

 mens of A. bonpJandi and .1. cceruleotinctus before me. 



12. Astylus bourgeoisi. 



Astyhis hourqeoisi, Kirscb, Abbandl. Zool. ]\Ius. Dresdeu, 1888-89, 

 no. 4, p. U", t. 1. fig. 20; Bourg-. Bull. Mus. Paris, 1911, p. 212. 



Astylus hissexguttatiis, Gorh. in Wliymper's Great Andes, Suppl. App. 

 pp. 52, 53, tig. (1891). 



<^ . Ventral segrnent 5 broadly arcuato-eniargiuate, 6 sub- 

 triangular, sulcate down ihe middle, notched at the tip. 

 Tegmen. luirrow, with long, compressed, subcontiguous lateral 

 lobes, which are ciliate and somewhat rounded at the tip. 

 Penis-sheath with the outer portion almost straight, sulcate 

 on the ventral aspect, abruptly narrowed at the apex. 

 $ . Ventral segment 6 short, simple. 



Hdh. C0L0:\IBIA {e.v coll. Sharp), Tiiquerres (sec, Kirsch) ; 

 Ecuador, Quito, Cayambe, Mindo, Machachi, &c. 



This variable in.sect is common at high elevations (8000- 

 lOjOOO ft.) in Ecuador, niany localities being given for it by 

 Bourgeois and Gorham, who figure similar well-maiked 

 examples. The latter have on each elytron a patch at the 

 base, two transversely placed, oblong spots towards the 

 middle, and a large annulus before the apex, flavescent or 

 red, these markings being sometimes reduced to small spots, 

 three of which represent the broken-up annulus. The inner 

 submedian juxta-sutural spot is rarely wanting, and the elytra 

 themselves are coarsely punctured. Two dissimilarly 

 coloured males have been di.ssected, showing no variation in 

 the armature. 



13. Astylus rivett, 

 Astylus riveti, Bourg. Bull. Mus. Paris, 1911, p. 213. 



Moderately elongate, shining, pilose, the hairs on the 

 upper surface mostly black, with shorter decumbent greyish 

 hairs intermixed, those on the under surface and legs 

 cinereous; Eeneous, the basal joints of the antennae, entirely 

 or in part, and the others at the extreme base, rufous; the 



