THE GHOUNIJ BEETLES. 41 



Common throughout the State. April 23-September 5. Some- 

 times occurs under rubbish remote from water. 



:2U (Til. OMOPIIRON TDSSELATUM Say, Journ. Phil. Acad. Nat. 

 Sci., Ill, 1SJ. l;jl>; ibid. II. !>T. 



Pale brownish-yellow; head with a screen hand across tlie 

 l>:ise; thorax with a small, subquadrate green spot which is 

 prolonged backward and forward along a deeply impressed 



rig. 28. 



median line; elytra with cross-markings metallic green. the 



(After Leng.) 



punctures of the striae close and tine. Thorax coarsely punc- 



tured near base and apex, more finely and very sparsely at middle and 



sides. Length (i-7 mm. (Fig. 28.) 



Common in the northern part of the State ; rare in the southern 

 portion. May 22-August 22. 



Tribe II. CYCHHIM. 



Head more or less constricted; neck often semi-globose; an- 

 tenna; slender, inserted under a feeble frontal ridge; labrum deep 

 ly forked ; body not pedunculate ; seutellum very small. Proster- 

 nuni not prolonged behind the coxa 1 ; hind coxa? separated by a tri- 

 angular process of the abdomen. The tribe is represented in the 

 eastern United States by two genera, separated as follows: 



KEY TO GKN10RA OF CYCHKINT. 



a. Antenna- with four basal joints glabrous. II. C'YciiRrs. 



mi. Antenna;' with two basal joints glabrous. NOMARETUS. 



Of these only specimens <,f ('m-Jinix have as yet been taken in 

 Indiana, though two or three species of Nvniarrtus should be found 

 here. They are black or violaceous in color and 10-13 mm. in 

 length. 



II. CYCHRUS Fab. 17!)4. (Gr., "a ground runner.") 



Beetles of medium or large size, violaceous or brownish-purple 

 in color, having the head elongate, the mandibles long, slender, 

 curved and without a bristle-bearing puncture on the outer side; 

 labial and maxillary palpi very long, the last joint hatchet-shaped 

 and concave. The elytra have 14 to 18 very distinct stria.', which 

 are sometimes irregular or replaced by tubercles. The species live 

 beiK'Hfh stones and leaves, usually in moist woods, and feed upon 

 snails, their long heads having, in the course of time, become especi- 

 ally adapted to extracting these animals from their shells. For 

 synopses of the genus see ; 



