1907.] SPECIES OF CRYPTOCEPHALIXE BEETLES. 853 



Metallactus divisus, sp. n. . 



Below black ; thorax dark purplish, closely punctured ; elytra 

 strongly and closely punctate-striate, flavous, a sutural, posteriorly 

 widened band and a broad, elongate, subquadrate patch at the 

 sides purplish ; femora fulvous. 



Length 3 millim. 



J . Upper portion of head entirely occupied by the large eyes, 

 which meet at the top, they likewise extend sideways down to 

 the clypeus and are triangularly bub not deeply emarginate at the 

 base of the antenna? ; clypeus triangular, deeply punctured, 

 purplish ; antennae slender, black, lower four joints fulvous 

 below, third and following joints very elongate. Thorax about 

 one-half broader than long, sides widened at middle ; surface 

 rather strongly and closely punctured, with a deep oblique 

 depression at each side near the base, the puncturation at the 

 sides scarcely stronger than at middle. Scutellum longer than 

 broad, finely punctnred, greenish black. Elytra wider at base than 

 the thorax, parallel-sided, with a shallow transverse depression 

 below base ; shoulders very prominent ; surface closely and strongly 

 punctate-striate, the punctures near the suture irregularly placed, 

 interstices at the sides slightly costate ; the suture with a purplish 

 band, very narrow at base, but suddenly angulately widened near 

 the apex ; the sides with an elongate subquadrate band, which 

 commences before the middle and ends obliquely before the apex, 

 this band approaches very closely the sutural stripe at its middle, 

 but is rather abruptly constricted behind, leaving the apex in 

 shape of a rounded spot of the flavous ground-colour. Legs 

 flavous, the anterior tibiae and tarsi darkened. Prosternum 

 longer than broad, strongly rugose-punctate. 



Hcd). Gov. Chaco, Argentine Rep. 



More closely allied to M. succinctus Suff. than to any other 

 species, but the eyes touching, only feebly emarginate, clypeus 

 coarsely punctured, pattern of elytra different, and general size 

 much smaller. 



Metallactus unicolor, sp. n. 



Entirely fulvous, apical joints of antennse black. 

 Length 4 millim. 

 . Head impunctate at the vertex, lower portion depressed, with a 

 few fine punctures widely separated ; emargination of the eyes 

 narrowly subquadrate, finely punctured ; antennse black, basal 

 joint fulvous, third and fourth joints elongate, equal, terminal four 

 wanting. Thorax twice as broad as long, obliquely but moderately 

 constricted anteriorly ; lateral margins feebly rounded below the 

 middle, anterior margin preceded by a short depression at middle, 

 base with a deep transverse short sulcus near the anterior angles ; 

 surface very remotely and irregularly punctured. Scutellum 

 strongly raised, broad, impunctate. Elytra not wider at base 

 than the thoiux, finely and iiregularly punctiired at basal portion, 



