Till: WHIRLIGIG liKETLKS. 239 



4<;:: nr.ir, I. GYKINI-S MINI-ITS Fab., Syst. Eleut., I. isdl. 27<>. 



Elongate-oval. Above blue-black; sides and margins of elytra bronzed; 

 beneath brownish-yellow, abdomen black, last ventral segment pieeons. Me- 

 dian line of thorax and sciitellmn with a tine carina ; mesostermnu with a 

 deep median furrow. Length 4-4.5 mm. 



Woodland pond near Hroad Ripple, Marion County; scarce. 

 May 15. Readily known by tin- marinate srntelhini and bieolored 

 under surface. 



4<<4 (I.IOX). GYKINUS FRATERNUS Coup., Can. Nat.. 2nd Ser.. II, 00. 



Elongate-oval, rather robust. Above blnish-black. ]iolished. not bronzed; 

 under surface uniform dark reddish-brown. Tips of elytra broadly rounded. 

 Length G mm. 



Pine, Lake County and Hudson Lake. Laporte County; scarce. 

 May 20-Angust 20. Known by the more robust form and entire ab- 

 sence of bronzed lustre. 



4<',5 (1513). GYRIM s VKNTRALI.S Kirby. Eann. I'.or. Amer.. l\. 1X37. xo. 



Oval. Above black, very highly polished, iridescent; 

 margins, sides and suture of elytra bronzed ; beneath red- 

 dish-brown, sides and tip of abdomen a little paler. Length 

 <>.5-7 nun. ( Eig. 122. | 



Northern half of State; common. March 14- 

 September 19. A handsome species, easily known 

 by its larger si/e and more brilliant iridescent sur- 

 face. 



G. aquiris Lee., (i.5 mm. in length, is recorded 

 from the Middle States and Lake Superior. 



4(ii; (1509). (iviiiNL's .ENEOLUS Lee., I'roc. Phil. Acad. Nat. Sci., 18<ix, :;c.x. 

 Elongate-oval. Above uniformly black-bronzed, very shining; beneath 

 dark reddish-brown, the last two ventral segments paler. Elytra 1 punc- 

 tures in both this and linilxitiix larger and more distinct than in dii-liroux. 

 Length 5-5.5 mm. 



Low meadow pond-* near Bass Lake. Starke County, and Ilunt- 

 ingburg, Dubois County; scarce. April 8-May 9. 



4l!7 (1511 ). (ivRixrs DK IIKOIS Lee., Proc. Phil. Acad. Nat. Sci.. IXiiX, 30S. 



Resembles the next but wholly without bronzed lustre. Punctures of 

 elytral strife smaller, more crowded. Length 4.5 mm. 



Lake Maxinkuckee ; scarce. August 17. 



4C.X (1510). GYRINTS UMHA-ITS Say. Trans. Amer. Phil. So.-.. II. IXL'. 1 !. Kill; 



ibid. II. 5lU 



Short, broad, but little attenuate liehinil. Above black, shining, dis- 

 tinctly bronzed, especially so on margins and suture of elytra and front 

 margin of thorax: beneath reddish-brown, the middle segments of abdo- 



I !<; 234021 



