928 FAMILY ]j. SCAh'AH i;iI).K. 



Ill us'iuix tilt' I'ollowiiiii' tal)](' th(» student must, ;it all tiuias, l)o 

 careful tliat the specimens are jjerfcct; tiiat is, that the spinules at 

 the tips of the tihife are not worn or accidentally reduced to an equal 

 size, or that the long hairs fringing the sides of the tibise do not, by 

 crossing the field of vision, deceive into the belief that the spinules 

 are une(|ual. In tliose that are jiubescent, various accidental causes 

 may have removed the hairs. In old s])ecimens of those species in 

 which the clypeus is denticulate, the teeth are apt to be worn down, 

 as also the spurs of tiie tibi;c and the large teeth of the front tibia"'. 



KKY TO INDIANA SPECIKS OF AIMIODllS. 



It. Sciitclluni lell.i,^ (»iH'-C(]nrlli or tuie-fil'tli (lie loii!.;th of the elytral suture; 

 front tit)i:i' not serrate above the upper tooth. 1750. hamatis. 



(/(/. .Sfutelhini sliort, not more than one-eighth to one-tentli the length of 

 suture. 

 1). Apex of haul tibia' fringed with sliort, efpial spinnlos; head with 

 three small tubercles on the vertex. 

 c. Thorax with distinct basal marginal line. 



d. Mesosternum not carinate between the C(txa". 



e. Elytra clear red; thorax dissimilar in tiie sexes, imi)ressed in 

 front in the male. 1Tr»1. fimetakics. 



ec. Elytra pieeous er dull red; tlmrax similar in the sexes. 



/. Color wholly iiiceous black, front angles of thorax never 

 paler; first joint of hind tarsus very little longer than the 

 next twd ; form small, robust. 1752. ruricola. 



//. Front angles of thoi'ax paler ; first joint of hind tarsus as 

 long as the next three; elytra uniform reddish-brown, the 

 first interval narrower than second. fcetidus. 



(hi. Mesosternum distinctly carinate. 



//. Coha- entirely black or picetms; first joint of hind tarsus not 



longer than the next two; first or sntural interval of elytra 



as wide or wider than second. 1753. granarius. 



fW- Elytra reddish-l)rown, the suture and side margins pieeous ; 



first joint of hind tarsus equal to next three. 



17,54. vriTATCs. 

 cc. Thorax without trace of basal marginal line; color dull brownish- 

 yellow, with hind portion of head, large spot on thorax and su- 

 tural line of elytra dark brown or pieeous. 1755. lividus. 



hh. Ai»ex of hind tibia? fringed with unequal spinules; head rarely with 

 tubercles. 

 h. Elytra opa<iue; (•(doi- reddish-brown, head and thorax slightly 

 darker; size small, ."..5-4 mm. 175(;. i.kni'cs. 



////. ]<;iy(r;i more or less shining. 



■/. Thorax not ii.-irrowci' at b;ise than aiiex, not sinuate at si(l<'s 

 ne;ir hind angles. 



