2-1-0 FAMILY T. GYElXin.E. 



men darker. Elyti-a broad, tapering but little behind, tips subtruncate, 

 outer angle rounded; covering the entire abdomen (male) or leaving only 

 the tips exposed (female). Length o.S^.2 mm. 



Taken only along the borders of AVawasee and Hudson lakes, 

 where it was found in ^ery large colonies. July 15-July 18. 



4r.9 (1519). GYBiN-rs affi>-is Aub6, Spec. Gen., VI, ISaS. 669. 



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

 taceous, margins bronzed; beneath dusky bronzed, the last ventral seg- 

 ment reddish-brown. Elytra with tiiis more concave than usual, their 

 punctures fine, close-set. Length tJ..5-7.5 mm. 



Putnam County : scan-e. July 4. 



470 (, ). Gtbixis piceolvs sp. nov. 



Oval, moderately convex. Black, ijolished, the suture and side mar- 

 gins of elytra bronzed; under surface black, the last ventral paler; epi- 

 pleura and legs reddish-brown. Elytral punctures well marked, the outer 

 two rows coarser. Length 5.5 mm. 



Lake County : rare, ilay -5. 



471 (1521). GYBixrs analis Say. Trans. Amer. Phil. Soc, II. 1S23. 10s; 



ibid. II, 520. 

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

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

 brown. Elytra with tips broadly but obtusely rounded. Length 5-6 mm. 



Throughout the S^tate; common. April 11-Oetober 23. 



471! (].'i27). Gyein-us bobk.\os Aub4, Spec. Gen.. VI. IsSS. 692. 



Broadly oval. Above black, highly polished, margins and sides nt ely- 

 tra bronzed; beneath black, the last ventral segment dark brown. Punc- 

 tures I if elytral striae fine, rather close. Length 7 mm. 



Throughout the state : frequent. April 23-August l.T. Re- 

 semliles ventmlis but broader and with under surface black. 



47:; il52Si. Gybinis li'GENS Lee.. Proc. Phil. Aeail. Xat. Sei.. Isij.S, 30!!. 



Broadly oval. Resembles horealis. but above black, slightly pc.lisheil, 

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

 El.rtra with tips more rounded and with outer angles less distinct; punc- 

 tures finer, more distant one from another. Length 6 mm. 



Lake and Laporte counties : scarce. ^lay 20--Tuly 15. 

 G. pcctoralh Loe.. is a boreal species which may occur in north- 

 em Indiana. 



IT. DixEUTEs :McL. I'^in. Mir., -to whirl or swim in an eddy.'"! 



The species of this uenus arc all of fair size, more or less oval 



and ^nbdepresM (1. TIk y have the njiper surface usually shinintr. 



