(i:U KAMILV XXVI. — MTIDl l,ll).l';. 



ji'itiatc and a small additional segment visible. Five are known 

 from the eastern Tnilt^l States, all of -which may oeeiir in Indiana, 

 though bnt threi^ have as yet been taken. 



KKY TO IIIK SI'IX'IKS OF COLASTrs. 



(/. Hind angles of thorax distinet. 

 /*. Sfutollmn smootli at tip. 

 c. Form broadly oval. 



(/. 'Pliorax with an oliliiine iiit or Ionc-i in each hind angle. 



1217. MOKlO. 



(/(/. Tlioi-ax withont fovea; elytra each with fonr reddish spots. 



MACULATUS. 



<c Form oblong, mnch depressed ; elytra dull yellow, the sides and 

 ai>ex narrowly piceous. 1218. semitectus. 



bh. Scutellum densely iMmdurcd; color nniforudy piceous. unicolor. 



iKi. Hind angles of thorax obtuse, roundel; form oblong-oval, depressed. 



1219. TRUNCATUS. 



1217 (3GS5). CoLASTUs Aior.io Erichs., Germ. Zeitschr., IV, 184.3, 242. 

 Broadly oval, depressed. Piceous black, shining, sparsely pubescent; 



under surface piceous; antennae and legs reddish-brown, the club darker. 

 Head coarsely and densely punctate. Thorax more than twice as wide as 

 long, sides broadly curved, apex emarginate; base bisinuate, twice as wide 

 as apex ; disk coarsely and rather closely punctured, with a vague depres- 

 sion each side of scutellum and a distinct oblique one near each hind angle. 

 Elytra together wider than long, with somewhat Irregular rows of coarse, 

 close-set punctures. Length 4-5 mm. 



Putnam Connty; rare. March (!. Taken from under surface 

 of hickory slab. 



1218 (.3(i87). CoLASTUs SEMITECTUS Say, .lonru. riiil. Acad. Nat. Sci., V, 



182.''), 182; ibid. II, 288. 



Elongate-oval, much depressed. Piceous, moderately shining; elytra 

 dull reddish-yellow, narrowly piceous on sides and apex. Thorax one-half 

 wider than long, apex narrower than base, surface coarsely but not densely 

 punctate. l]lytra rather densely ipunctate, the punctures near suture in ill- 

 defined rows. Proslenium very si)arsely punctate. Length 3-4.5 mm. 



Lake. Crawford and Tosey counties; scarce. ^lay 21-Jidy 3. 



121!) (3GS!)). COLASTUS THUNCATns Rand., Best. .Tour. Nat. Hist.. II, 1838, IS. 

 Oval, slightly oblong, strongly depressed. Dull reddish-brown; head 

 usually piceous. Thorax nearl.v twice .is wide as long, narrowed in front, 

 width of apex erpial to length, disk feebly convex; surface, as well as that 

 of elytr.i. i:itlier densely puiicl.ile. .Vpex of elyti'a broadly emarginate- 

 truncale. I'mslei'iinni nearl.\ suiootli. Length 2-2.5 mm. 



