■niK I, AMKI.I.ICOIJK T.Kl^TLKS. 961 



Moreover, spcciinciis which iioi'innll.N have lO-jointed antenna^ some- 

 times, but rarely, have two of the joints united, so that the number 

 is reduced to nine. The O-jointcd speeies, however, never have the 

 number of joints increased to ten. 



In the papers by Drs. Iloi-n and Smith, 9;^ species of Lachno- 

 sterna are reeogni/ed from the I'nited States. Of these 26 have 

 been taken in Indiana, wliile nine others |)erhai)s occur. Since the 

 number of species is so hu-.U(^ tlie iicnus is lifst divich'd into six 

 oTon]is. and these, in lui-n. into s])ecies. 



KEY TO GROX'PS OF INDIANA LACIINOSTERNA. 



(I. lliud tibia' of iiinlo witli <me spur fixed. 



1). Fixed spur of Iiind tihi.-e of male ver.v sliort ; foi'in ol)Ioug or elongate, 

 siibc.viindrical. (Jroup A. p. 9(51. 



bh. Fixed spur of liiiid tibiie of male at least uioderately long; usually 

 half or more as long as the other. 

 c. Aiwx of hind tibife of male with a distinct sinuation or notch on 

 inner edge at base of fixed spur. (;rou]i /.'. i'. '•'(".'J. 



cc. Apex of hind tibia; of male squarely truncate. 

 d. Antenna? 10-jointed, 



e. Body above glabrous. Group C, p. 9(55. 



ee. Body above pubescent. Group E, p. 97(). 



fid. Antenn:o '.(-.jointed ; body soniet lilies liairy. (Jronp /), p. 974. 



(III. Hind 1ibi;e of male willi l»otli spurs free and slender. (Jroup /-', p. 9TS. 



Group A. 



Our three species classed in this group are oblong or elongate 

 and subcylindrical in form, pale brownish-yellow in hue, and have 

 the inner spur of hind tibi^ of male short or wanting, the outer 

 long and slender. 



KEY TO INDIANA SPECIES OF GROrP A. 



a. Antennte 10-jointed ; clji^eus feebly emarginate. 



J). Inner spur of hind tibia; of male distinct. 1810. ephilida. 



hi). Inner spur of hind 1ibia> of- male wliolly absent; form more slender. 



gl.\berri.ma. 

 aa. Antenna^ 9-jointed ; clypeus deeply emarginate. 1S11. longitarsis. 



1810 (5749). Lachnosterna ephilida Say, Journ. riiil. Acad. Nat. Sci., 

 V, 1825, 19G; ibid. IT, 298. 

 Moderately elongate, subcylindrical. Pale brownisli-yellow, sliining; 

 head and thorax darker. Cl.ypens broadly rounded or very feebly emargi- 

 nate, coarsely but less densely punctured than the front, the border re- 

 flexed. Thorax short, narrowed in fronl. rather coars(>ly. not closely punc- 

 tate. Elytra more coarsely and deeply lauurtureil, the submargiual eosta 



