NOKTH AMERICAN COLEOFTERA. 1 ()7 



S. vitiosus 11. sp. — Agrees with tbc prccecling in appearance, but is less ro- 

 bust, more elongate, formation of beak, anteniiEe and legs the same ; it differs as 

 follows: scales smaller, whitish, beak a little more slender. Prothorax wider 

 than long, narrowed in front, rounded on the sides, not constricted at the apex, 

 widest at the middle, punctures smaller, round, more remote and not at all con- 

 fluent. Scutel rather large, rounded. Elytra oblong, more than one-half longer 

 than wide, not widened behind the middle, sides straight, parallel, impressed 

 behind the humeral angle. The prosternuin is longer in front of the coxse, not 

 deeply emargiiiate. Length 3.0 mm, : 0.12 inch. 



ifaft.— Walnut, Ariz. (Wickhain). 



One male specimen in niy collection, but for the pronounced dif- 

 ference in the form and punctuation of the prothorax, it does not 

 differ from the preceding. 



S. I'lif iiliiiii n. sp. — Elongate-oval, ferruginous, elytra and legs a shade paler, 

 the scaly vestiture consisting of rather small, oval, pale, semi-transparent scales, 

 a little more dense on the underside than above. Beak somewhat slender, 

 curved, slightly thickened from base to the insertion of the antenna;, shining, 

 punctured and scaly near the base ( 9 ). basal tufts nearly obsolete, constriction 

 feeble; scrobes not oblique. Antennse inserted two-fifths (9) from the base, 

 slender, second joint of funicle one-half longer than the third. Head sparsely 

 punctured and scaly. Prothorax a little wider than long, narrowed in front, 

 broadly but not strongly constricted at the apex, rounded on the sides before the 

 middle, nearly straight, and somewhat convergent behind, surface rather finely 

 punctured, punctures not crowded, intervals feebly .shining, scales condensed on 

 the sides, internii.ved with suberect, scale-like hairs. Scutel puiictiform. Elytra 

 less than one-third wider at the base than the prothorax, suboval, very feebly 

 rounded on the sides, humeri not very prominent, rounded, strise distinct, not 

 concealed by the scales, punctures not very obvious, setre suberect, rather dis- 

 tinct. Prosternum rather short in front of the coxse, postocular lobes not very 

 prominent. Thighs moderately clavate, tibise feel)lj^ emarginate within, terminal 

 hooks distinct; claws slender, third joint not very broadly bilobed. fourth mod- 

 erately long; tarsi rather small, connate nearly to the middle. Length 2.2 — 

 2.5 mm.; 0.09—0.10 inch. 



Hah. — New Mexico, Arizona (Riverside, Wickluim). 



Two females in my collection. Ke.-iembles the preceding species 

 in coloration, but is less robust, in fact one of the above s])ecimens 

 is rather slender, the prothorax is more finely punctured, the elvtra 

 much less wider at base than the prothorax and the strijc finer ; the 

 outer apical angle of the tibiic is not jjroduced. 



Obtedus Group. 

 The species comprising this group have the antenna; more robust 

 and the second joint of funicle not or only very little longer than 

 the third. The apical hook of the tibial indistinct in all of them ; 

 third tarsal joint narrow, or feebly bilobed. They differ greatly in 

 appearance, and are readily distinguished as follows: 



TRANS. AM. ENT. SOC. XXI. JUNE, 1894. 



