NORTH AMF.RrCA.V COLKOPTKUA. 57 



pubescence, leaving only a moderately wide fascia on midtUe naked, the space 

 margined by paler wliiter pubescence. Beneath moderately punctate. Lengtli 

 2—^^.b mm. 



//«/>.— Penn., N. Y., D. C, Mass. 



A very variable species as regards size and intensity of color, one 

 specimen taken by me in New York being fully 3.5 mm. in length, and 

 pale brown in color, and the ifnpubescent fascia strongly marked. A 

 number of specimens from Massachusetts seen in Mr. Austin's collection 

 were scarcely 2 mm. in length, and of an almost uniform sordid brown. 

 It seems not uncommon. 



A. pyrif\>rnie n. s}>. — Black, elytra brown-red : pubescent. Head elongate 

 narrowins; from base to rostrum ; eyes not at all prominent; front densely punc- 

 tured and rugose, clothed with fine white pubescence; rostrum short and thick; 

 antennae moderate, joints proportioned as before. Thorax as long as wide; wider 

 at base, densely punctured and pubescent, with a longitudinal impressed line pro- 

 found at base, obsolete toward tip. Elytral humeri small, striae profound, punc- 

 tures moderate, intervals narrow and convex. Beneath sternum witli three lon- 

 gitudinal striae, abdomen punctured. Length 1.75 — 2.25 mm. 



Ifaf). — Arizona. 



The type of the group and rather more compactly built than either 

 of the two others. The difference in coloration between the thorax and 

 elytra will serve to distinguish it- A few specimens only, all from one 

 locality. 



Group crassinasum, Plate .3. Fig. 1."?. 



The species of this group are moderately convex, the elytra narrow or 

 moderately ovate in form ; the species, excepting modest um and per- 

 vumitvm, are closely allied, but yet sufficiently distinct to prevent mistakes. 

 The following table will aid in identifying them : 



Thorax narrow, cylindric: sides equal, but little wider at base than apex. 

 Distinctly pubescent, basal Joint of antennae long, piceous, 2.25 iiini. 



Sparsely or not pubescent; basal joint of antennae short, black. 2 mm. 



yicinum. 

 Thorax distinctly wider at base ; sides obli(|ue or arquate. 

 Itostrum greatly dilated near base. 



Color brassy black, distinctly pubescent, 2.25 mm crassinasiim. 



Rostrum but little or not at all dilated near base. 



Elytra widening to behind middle, size large, 2—2.25 min proclive. 



Elytra more equal; size small. 



Legs black; pubescent. 1 mm lliodestiiiu. 



Legs red : not at all pubescent. 1 mm perniinutlim. 



A. Wal$«hii Smith, ianuginosum. Walsh Pr. Ent. Soc. Ph., 1867. 2ti9.— Black, 

 pubescent. Head small, conic, narrowing regularly to rostrum, densely punctured ; 

 eyes not at all prominent, rostrum elongate : l)asal joint of antennae equal Ui one- 

 third of whole length of that member: second nearly half as long as first. Thorax 



TRANS. AMKU. KNT. SOC. .\l. (15) JAM AllV, ISS-J. 



