U4 



including the rest ; furrows punctured ; interstices very minutely and 

 thinly punctured ; sides of the abdomen longitudinally wrinkled : tooth 

 of the shoulder short and wide, placed a little above the middle. 



FAMILY STENOCHIADit. 



Genus Arthromacra AVr/^y.— Labrum transverse ; labium dilated 

 above the insertion of the palpi, subemarginate : mandibles bidentate at 

 the apex ; maxillaj bilobed ; lobes thick, obtuse ; maxillary palpi 

 incurved, four-jointed ; first joint minute ; second longer than the rest, 

 clavate ; third shorter than the fourth, triangular ; fourth very large 

 securiform, with the .truncature oblique : labial palpi three-jointed, last 

 joint securiform ; mentum obtriangular ; antennae filiform, eleven-jointed ; 

 scape short, incrassated ; pedicel short, incrassated at the apex ; joints 

 3 — 8 obconical, nearly twice the length of the pedicel ; last joint cylin- 

 drical, downy, as long as the five antecedent ones taken together. 



Body long and slender ; head triangular ; eyes kidney-shaped ; pro- 

 thorax cylindrical, not wider than the head ; scutellum rounded ; elytra 

 wider than the thorax, linear ; legs slender ; tarsi very long. 



[239.] 324. Arthromacra donacioides Kirby. — Length of body 

 5 lines. Taken in Canada, near I^ake St. Clair, by Dr. Bigsby. Speci- 

 mens also from Massachusetts. 



Body black-bronzed with a greenish tint, glossy, with the whole upper 

 surface thickly aud irregularly punctured ; underneath, except the sides 

 of the trunk, impunctured. Antennae much longer than the head and 

 prothorax, scape and pedicel dusky, 3 — 8 joints tawny-yellow : last joint 

 black, downy ; prothorax nearly cylindrical ; elytra wider than the pro- 

 thorax, obtuse at the apex ; thighs a little incrassated ; apex of the cubit 

 and tarsi tawny-yellow ; two last joints of the latter dusky. 



This singular insect, at first sight, looks very like a Donacia, a 

 resemblance merely given by its colour. 



[Belongs to Statyra Latr. ; previously described as Lagria aenea by 

 Say (Am. Ent. i, 191) ; not uncommon in Canada.] 



FAMILY CISTELlDvE. 



325. CiSTELA ERYTHROPA Kirby. — Length of body 5 lines. Taken 

 in Canada by Dr. Bigsby. 



