240 FAMILY V. — (iYinNTn.-i''.. 



men darker. Elytra broad, tapering but little behind, tips snbtruncate, 

 outer angle rounded; covering the entire abdomen (male) or l(\iving only 

 the tips exposed (,f<?iwtile). Length 3.8^.2 mm. 



Taken only along the borders of Wawasee and Hudson lakes, 

 where it was found in very large colonies. -Inly 15-July 18. 



409 (1519). Gykinus affinis Aube. Spec. Gen., VI, 1S38, GU9. 



Elongate-oval. Black, moderately shining; upper surface minutely alu- 

 tacoons, margins bron/.ed ; benealli dusky bron/.cd. the last ventral seg- 

 ment reddisli-br(.\\ii. I'Mytra with lips moiv concave than usual, their 

 pnnctiH'os tine, close-set. r.engtli <*>.."> ~.~> mm. 



Pntnam Comity; scarce .Inly 4. 



470 ( ). Gykinis I'lcKoi.rs sp. nov. 



Oval, moderately convex. lUack. polished, the suture and side mar- 

 gins of elytra bronzed; under surface bl.-ick. the last ventral paler; epi- 

 plenra and legs reddish-brown. Elytral pinictures well marked, the outer 

 two rows coarser. Length n.o nun. 



Lake Connty; rare. ]May 5. 



471 (1521). GvRiNrs analis Say, Trans. Amer. Phil. Soc, II, 1S23, 108; 



ibid. II, 520. 

 Elongate-oval. Pdack. bronzed both above and beneath; upper surface 

 not highly polished; beneath black, legs and last ventral segment reddish- 

 Itrown. Elytra with tips broadly but obtusely i-ounded. Length 5 (J mm. 



Thronghoiit the State; coiinnon. April 11 -October 28. 



472 (1527). (ifYKiNrs bokkaiis Aube, Spec. Gen.. VI, 1S;18, (>92. 



r.roadly oval. Above bl;ick, highly ]iolished, margins and sides of ely- 

 tra bronzed; bene.'ith black, the last ventral segment dark brown. Punc- 

 tures of elytral striie fine, r.ather close. Length 7 mm. 



Throughout the State; frequent. A]^ril 28-August 15. Re- 

 scnibles vrnl ntlls but bi-oader and witli under surface black. 



17;'. (1528). Gyrincs ligens Lee, Proc. I'hil. Acad. Nat. Sci., 18C8, mu. 



P.roadly oval. Resembles horeuUs, but above black, slightly polished, 

 not at all bronzed ; beneath black, the last ventral segment dark browai. 

 Elytra with tips more rounded and with outer angles less distinct; punc- 

 tures finer, more distant one from another. Length G mm. 



1 ake and Laporte counties: scarce. May 20-July 15. 

 (r. pecioralis Lee., is a boreal species which may occnr in north- 

 ern Indiana. 



IT. DiNEHTES ^IcL. l.Sli). fOr.. 'Mo whirl or swim in an eddy.") 



'i'lie species of this gciuis arc all of fair size, more or less oval 

 and siihd('j)i'('ss( (I. TIk y ha\'c llm upper surface usnally shining, 



