142 PAMILT il. CAEABID-*:. 



jj. Mentuiu with a small emarginate tooth. 



XLV. Mliablols. 



gg. Labial palpi thick, oval ; claws of tai-si more or less serrate : 



length 3 mm. XLVI. Axi^opatpus. 



ff. Tarsi with the fourth joint emarginate or bilobed; tarsal claws 



serrate. 



A-. Thorax truncate at base ; mentum toothed. 



I. Tarsi with fourth Joint bilobed ; elytra blue or green. 



XLYII. Caluda. 

 U. Tarsi with fourth joint emarginate. 

 III. Tarsi not hairy above; size medium, 7-11 mm. 



n. Last joint of labial palpi more or less triangular or 

 hatchet-shaped; thorax with sides rather widely 

 margined near base, which is squarely truncate. 



XIiYIII. PlOCHIONtS. 



nn. Last joints of both palpi similar, more or less cylin- 

 drical, truncate. XLIX. Pixacodera. 

 mm. Tarsi hairy above; next to last joint of labial palpi 

 usually with more than two setae: length 10-15 mm. 



L. Cymixdis. 



1:1-. Thorax lobed at middle of base : tarsi hairy above : last joint 



of labial palpi hatchet-shaped. LI. Apexes. 



CO. Mandibles without grooves on outer side ; mentum not toothed ; 



fourth tarsal joint not dilated; claws simple. 



LII. Pextagoxica. 



XXXIX. Tetragoxoderts Dej. 1S25. (Gr.. " four -f angled.") 

 Small piceoiis or brownish-yellow beetles, separated from allied 

 genera mainly by the characters given in key. One species has 

 been taken in Indiana, while another may occur. 



KEY TO INniAXA SPECIES OF TETR;i&0X0DEEUS. 



a. Elytra in great part piceous; legs and outer joints of aatertuse iiieejus: 



presternum margined at ti;i. ixtersectis. 



««. Elytra more brownish-yellow than pioe.ius, leas and antennae wholly 



brownish-yellow ; presternum not margined. 1144. fasciatis. 



T. intersectu.-< Germ.. 5-6 mm. in length, has been taken in Ken- 

 tucky and the Gulf Slates, and perhaps nccurs in southern Indiana. 



-:44 is6ii)- TETBAGOXODEKrs FASCiATUs Hald.. Proc. Phil. Acad. Nat. Sii.. 

 I. 1842, 20S. 

 Ovate, subdepressed. Head and thorax piceous, bronzed, minutely alu- 

 taceous; elytra grayish <:r dull yellnw. with a semicircular space about the 

 scutellum. a broad irregular broken band at middle, and the apical fourth 

 jiireijus. Thora.x one-half wider than long, sides curved, hind angles dis- 

 tinct; disk smiMth, the median line distimt. Elytra oval, rather deeply 

 striate, the sirite not punctmed : intervals convex, the third with two small 

 dors;il punctures. Males with three joints of the front tarsi dilated and 

 clothed with small s.ales beneath; last ventral notched at middle of hind 

 margin. Length 4.5 ram. 



