TIIK I,AM10M-I(:()1;N I'.l'.iri'l .ks. 911 



Ki:V TO SI liTAMIIIKS OF SCAKAli.KlD.i:. 



(/. Abdoiniiiiil spirnclcs situated in ,i line on the luvinhntiic cduuecting the 

 dorsal and ventral hum like plates, the last one, like the others, 

 covered l>y tlie elytra: ujiiier snrfaee of head usually much dilated 

 (in tlie I'nmt and sides; duni; eating or skin beetles. 



Subfamily I. Lapakosik ri, p. ".Ml. 

 (/(/. .Mnlonunal spiraeles, e.xcept the front one or two, not situated on the 

 membrane above mentioned, the last one usually visible behind the 

 elytra: upiier surface of lie.-id rarely dilat(Ml: vegetable feeding spe- 

 cies. 

 h. Abdonunal siiiracles in jiart situated on the superior portion of the 

 ventral segments, the rows of spiracles feebly diverging. 



Sul)family II. Melolonthin.k. p. !>47. 



J)h. Abdominal siiiracles (excepting the three front ones) situated on the 



dorsal portion of the ventral segments, forming two rows which 



diverge strongly. Sul)faini]y HI. Pi.TcrRosircTi, p. DSO. 



^uhfamily I. LAPAROSTICTI. 



In addition to the eliavacters ahove given the Laparosticti, or 

 ("oprophaga, as they are sometimes called, are distinguished hy hav- 

 ing the suture separating the elypeus from tlie head distinct, and 

 not transverse but extending ujnvard toward the vertex; club of 

 antenna? consisting of only three joints. They all live on decompos- 

 ing matter, most of them in dung or fungi. The subfamily is di- 

 vided into eight tribes, six of which are represented in Indiana. 



KEY TO INDIAN.V TRIBES OF LAPAROSTICTI. 



ii. Abdomen with six visible ventral segments. 



h. Antenn;e with eight to ten joints; mandibles concealed by the ely- 

 peus except in the genera .TJgialia and OchoOien^. 

 c. Hind tibite with a single terminal spur (except in Cunthon iiigri- 

 cornis) : f(.rm shorter, rounded: end of the a))domen exposed. 



Tribe 1. CoPRixi. p. 912. 

 re. Hind tibiie with two spurs; abdomen wholly covered by elytra; 

 si7.e usually small. 

 (I. Antenna' !»-.iointed ; form oblong-convex or subcylindrical. 



Tribe' II. Apiiodiini, p. t>2lt. 

 (hi. .Sntemue lO-.jointed : fcu'in oval, convex. 



Tribe III. Orphxini, p. O.'vl. 

 hb. .Vntenna' ll-J(rinled: mandibles prcndnent. visible from above. 



Tribe I \'. Geotrupini. p. 0."?(). 

 (/(/. Abdomen with tive visible ventral segments. 



c. Body partially contractile, rounded, smooth, shining; scutellum rela- 

 tively large. Tribe V. Acanthocerini, p. 040. 

 re. Body not contractile, oblong, convex, roughly sculptured; scutellum 

 small. Ti-ibe VI. Trooint. ]\ 041. 



[58—23402] 



