rriR WATKl! SCAVENORR BEETLES. 261 



lembm" 7. A iiiciiilu'i- of llic horc.-il r.-niiiJi. Next in size to ciitctus, 

 l)nt brownish instead of blaek. more oblong and less convex. 

 P. difJ'usKf; Lee., is recorded from Illinois and westward. 



50(> ♦nn.'io"). PiiniiYDKrs cinctis Sny. T-cns's Exiied.. II, 1824, 27(i ; iln«l. 

 I, ISl'. 

 Ov:il. sliixlitly dblinig, very convex. P.liick. sliiiiiiij;; entire margin dark 

 reddish-brown. Thorax with basal marginal line very fine and indistinct: 

 its surface finely and evenly punctured. Elytra a little more coarsely and 

 si>arsely pimctured than thorax, the dorsal rows distinct but feebly im- 

 lirossed. Length 6.5-7 mm. 



Thronghout tlir I^tate; '^ommoii. TTibei-natcs as imau'o. Febru- 

 ary ll-Deceml)er 8. 



507 (l(i;W). riiiMiYDius PERPi-Exus Lcc. Proc. Phil. Acad. Nat. Sci.. VII, 



1855, 371. 

 Oblong-oval, fully twice as long as wide. Above piceous-black, shining; 

 sides of thorax and elytra with narrow paler border. Thorax closely and 

 finely punctate, its basal marginal line always distinct. Elytral punctures 

 coarser than those of thorax, the usual dorsal rows feebly indicated. I>ength 

 4-5.5 mm. 



Coiiiiiion 1liron;t«'liont tbe noi'tlicrii half of State;; less so in tht; 

 sontliern ])ortion. A])ril 2n-Oetober 28. 



XTI. Helochares Mnls. 1844. (Gr., "marsh + rejoice.") 



\'ery close to PhilJniflnis and formerly united with it. One spe- 

 cies occnrs in Indiana. 



508 (1G?,9). Helochares maculicoli.is Muls.. Ann. Sc. Phys. Nat. Lyon.. 



VII, 379. 

 Oblong-oval, distinctly narrowed in front, subdepressed. Above dull 

 brownish-yellow ; occiput and discal spot of thorax piceous ; under surface 

 black or piceous. Elytra with ten rather deeply impressed rows of serrate 

 punctures; intervals flat, finely punctulate, the fifth and ninth with a row 

 of coarse punctures. Length 4-5.5 mm. 



Lawrence and Dubois conntie.s; scarce. IMay 9-AugiTst 5. 



Xril. CvMBiODYTA Bcdcl. 1881. (Gr.. 'iioat ^ dive.") 



Small, oval. ])iceoiis or brownish species, formerly included un- 

 der Itoth Pkilhydrus and Hydrocomhus, but having only four joints 

 on the middle and hind tarsi. In the species occui'ring in the East- 

 ern United States tlu' elytra arc not striate, but usually have sev- 

 eral rows of coarse punctures. One si)ccies has l)oen taken in the 

 State, while two others mav occur. 



