AMERICAN COLEOPTERA. 185 



has however, a denser and longer pubescence especially on the elytra. 

 The prosternal process of the male is as long as the coxa3, arcuate and 

 compressed. The abdominal setae are rather slender when compared 

 with those of the two following species. In both sexes the elytral 

 vestiture is not dense and there are no erect hairs. The male has a 

 more slender form than the female. 



This species occurs especially in the Northern States, northward of 

 a line from Virginia to Colorado. 



M. aiigiif^tatus, Beauv., setulosus, 9 » I^sc. 



The male is a larger insect than the preceding. The prosternal 

 process is short, but little longer than half the coxas. The abdominal 

 setae are long and stout. The female has the hairs of the disc of the 

 thorax erect, those of the margin recumbent; the elytra have also 

 erect hairs near the base. The abdominal segments 1 — 5 have large 

 punctures, varying in number from 4 to 8 — 10 according to the seg- 

 ment, which give rise to moderately long hairs, while in suhspiiwaus 

 these hairs are entirely absent or very inconspicuous. 



This species occurs in the Gulf States, but I have seen one female 

 from Pennsylvania. 



.11. iiniroriBiis, n. sp. 



Resembles the two preceding in form and differs superficially in the 

 denser and longer vestiture. Both sexes have the thorax clothed with 

 recumbent pubescence, and the surface less deeply punctured than in 

 either of the preceding. The abdominal setas of the male are very 

 stout and stiff, those of the female few in number and on the first four 

 segments only. The prosternal process of the male is long, wider at 

 tip and moderately deeply emarginate. Length .40 inch; 10 mm. 



Occurs in Arizona. 



Sijnonymi/. 

 .11. SiitosplnoSMS, Fab., Syst. Ent., p. 39; Oliv. Ent. I. 5, p. 70: pi. 7, fig. 73, 

 a, b ; Lee , Jonru. Acad., 1856, p. 277, %. 



elongntuft. \\ Herbst, Kafer. III., p. 145; pi. 26, fig. 3, % . 

 polyphngus, Burin., Lamell. IV., 2, p. 57. 

 ain/ii.status, Lee, (in part), loe. cit., p. 278, % . 

 11. angusf atus, Beauv., Ins. Afr. et. Anier. I. 2, p. 30 ; pi. 5, fig. 6. 

 avgustatus, Lee, (in part), loc. cit. 

 setulosus, Lee, loc. cit., p. 277, 9- 

 11. iiniformis, Horn, n. sp. 



DICIIEI.ONYCHA, Kby. 

 The sexes may be readily distinguished by the structure of the 

 antennae, the club of the male being nearly as long as the funicle and 



TRANS. AMER. ENT. SOC. V. (24)" MARCH, 1876. 



