50 FAMILY II. CAEABID-T:. 



Common along streams and margins of ponds and lakes through- 

 out the Stat«. April 3-Deeember 25. <_)ne specimen from Putnam 

 County was taken on the latter date, indicating that the species 

 probably hibernates in the imago stage. 



VI. Blethisa Bon. 1^13. (Gr., "to throw.":i 



Kesembliug Elaphrus but much larger, with proportionally nar- 

 rower head and smaller eyes. Head and thorax parallel, the for- 

 mer with a deep groove each sid^: last .joint of masJUary palpi- 

 shnrt. They live during summer near rain pools or small bodies of 

 water. One of the four species kno^vn from the United States has 

 been taken in Indiana, while another perhaps occurs. 



EXY TO IXDIAXA SPECIES OF BLZTHISA. 



a. Thorax quadrate, smooth above and beneath except in the basal im- 

 pressions ; len^h 15 mm. qtiadricoiiis. 

 nil. Thorax subcordate, finely and densely punctate beneath ; length 12 mm. 



MULTlPU^fCTATA. 



40 1164). Beethisa quadbicolus Hald.. Proc. Phil. Acad. 

 Xat. Sei., Ill, 1S47. 149. 

 Blackish or coppery bronze above : black 1 leneath. Thorax 

 quadrate, sides feebly curved, margins strongly reflexed, 

 ba«al impressions spacsely punctate, hind angles obtusely 

 rounded. Elytra striate, punctured, each with about ten 

 fovese arranged in three row~. Length l.:i mm. i Fig. :>'^. i 



Kepreseuted in the collection by a single specimen, 

 taken Augnst 15 from beneath rubbish near a deep 

 pool in the center of a tamarack marsh, one half mile 

 south of DeLong. Fulton County. Spei-imens from 

 Lake and St. Joseph counties are in the TVolcott and 

 P'ield ^luseum eolleetions at Chicago. 



B. nndtipunctata Linn, has been taken in ^Michigan and northern 

 Illinois, and doubtless occurs in the northern third of Indiana. 



Tribe V. XEBRIIXI. 



Speries of small or medium size, mostly black in color: anteimxe 

 with four basal .ioints glabrous ; mandibles with bristle-bearing 

 puncture on outer .side ; eh-tra margined at base. Prosternum pro- 

 loiiL'-ed licliiiid the i-rtxie. till- cavitirs .ipen behind; liind coxa- touch- 

 ing. Five genera i-epr--ent lb.' tribe in the United States, two of 

 which occur in Indiana. 



