153 



174 spociinciis of this group, a fewluivc the suprastiftinatal accessory very 

 small or al)soiit, or else have a small stif;-mal;il one |)r('seiit, but nothing 

 was foiuid to justify further specific separation. ''IVpical larvie of this 

 group, carefully assorted, have been 

 rc})eate(lly reared by us to the adult 

 of triscdus, and at. I(>ast the bulk of 

 this lot undoubtedly belongs to this 

 very couunou species. 



In the second group the head 

 markings (l*'ig. 189, h), when tracts- 

 able, are not clearly formed of small 

 spots, and the substigniatal setifcr- 

 ous punctures are diagonally ])laced 



(Fig. 141, a). In this (rroup, lutcolellus (und(M- wiiich wiiiwc (■(iliginosclltif^ 

 and zecllus are included for reasons discussed further on) is recognizable 

 by its distinctly coarser and broader granulation, liy its yellowish head 

 with markings usually j)resent, and by the equidistant dorsal tubercles. 



e © © b)fl (3D 



l'"i(i. I'lO. Tliii'il ahiloiiiiiinl MOKiiient of 

 CratnhuH liirvjr, seen from al)()vc: «, ('. Iri- 

 acctua; h, C. luleolellus. EnlarKed. 



I''i(i. 141. Side of iliird nliilomiiiiil seKnioiit of dnniihuH larva;: a, C. vuli/ii'ii(;cUus 

 (as in lut(i>U'llus); b, C trisiHus; c, (.'. inuUibUis. EnlaiKod. 



usually with parall(>l inner margins, leaving only a narrow median 

 avenue between (Mg. 140, b). Fifteen of our si)ecimens belong here. 

 The remaining thirty-three have red to black heads, the h(\ad pattern 

 nearly or cpiite oJ)literated. One lot of five smaller larvic have red 

 heads, and may be ruricollcUus. The others have the heads entirely 

 black or more or less castaneous near the white V-mark, and ai)pear 

 to belong to viilgivagellus, according to pul)rished descriptions. 



