NORTH AMKRU'AN rOI.EOl'TERA . Itll 



I his iiiiiilit )h' cuiil'niiiitltHl is niiinitu. ilu' siiiallt-r s|)('ciiiifiis ht-in-j railicr 

 tliflinilt to se|tai':tt('. 



Oct'urs in tlif Miildlc ami Sdiiilit'iii States. 



A. liiritla Falj. — P'orm rather robust, color variable ; heail rather densely and 

 coarsely j)iinctured ; clypeus short, broader at base, the angles broadly rounded, 

 margin narrowly reHexed : thorax narrowed in front; sides regularly arcuate, 

 basal marginal line distinct: surface sparsely punctate ; elytra, with three inter- 

 vals regular and sub-costiform, the interspaces rather densely and irregularly 

 ]iunctured : pygidium sparsely punctate; body beneath shining, very sparsely 

 piinclate, pectus not hairy. Length .50 inch ; 12.5 mm. 



The claw joint of the front tarsus is not toothed beneath, tiie anterior claw deeply 

 cleft at tip, the two parts nearly e<]ual : the front claw of the middle tarsus is cleft 

 at ti)), the two portions equal. 



Tliis sjtfcics. lil<i' scvci'al ollicrs in (Utr t'aiiiia. fxtciids smitliwaid iiiKt 

 .Mt'xic-o, and even to Soiitii Anieric-a. 1 have seen but tvvii speeimens 

 i'niin New Mexico smd Arizona which airree (jiiite well in their color, hut 

 Buruieister describes the s])ecies as beiiiii; one of "reat variability in color. 

 Our specimens may be described as j)iceous, the leus, except the tarsi, 

 yellow. The tlutrax is broadly mariiined and testaceous as in nndulata, 

 there beiu'i- also near the side niaruin a piceuus spot surroundino- a large 

 puncture. The elytra are entirely brownish except three testaceous vittjt 

 which follow the line ol' the cost;«. From Burmeister's description the 

 elytra are sonu^times testaceous with brownish vittjo. thus reversiiii:- the 

 relations of the colors given above. It is evident that the colors here 

 arrange themselves in longitudinal vittte on the elytra, and do not form 

 spots which coalesce into transverse bands. 



This species is the only one in the present genus in which the spaces 

 between the sub-costiform intervals are punctured in a confused manner. 



New .Mexico and Arizotia. 



Sub-genus Riiombonyx. 



Two species occur in our fauna ; in both the dyjieus is rather dee]ily 

 concave, and the mjirgin uiore reflexed than in the other s])eeies of tiie 

 genus. 



Clypeus transverse, at least twice as wide as long, vertex snarsely ]innctured ; 



above varicolored NeiiiilividH. 



Clypeus very little wider than long, i-.ither densely punctured; body abuve 



uniformly yellowish C»vif*roil!4. 



.4. SiOinilividu Ia'^-. — <»bl(>ng, oval, color variable; head moderately or 

 sj>arsely punctured ; clypeus short, transverse, semicircular, margin widely re- 

 llexed ; thorax transverse, rather suddenly arcuate from the middle to the apex, 

 ilisc sparsely punctate, base with a ilistinct marcinal line: elytra with striie of 



rUANS. AMKIl. KNT, SOC. XI. (4lj MAY. 1SS4. 



