948 F.AAfrLT L. — sc^\]?AB.i';ni.i:. 



LrCdntc. —"Short Studies oC N. Amer, Coleoptera," in Trans. 

 Amer. But. Roc, VllI, lS8(t. A synopsis of the genus 

 Hoplia is given on pages 191-194. 



jJor((.— "Revision of the V. S. Speeies of Oehod[eus and other 

 Genera of Scarabseidas, " in Trans. Amer. But. Soe., V, 1876. 

 The genera Macrodactyhis and Dirhelonnrha are treated on 

 pages 183-192. 



Horn. — "Revision of the Speeies of Lachnosterna of America 

 North of Mexico," in Trans. Amer. But. Soc, XIV, 1887, 

 209-296. 



Smith, John B. — "Notes on LacJuwsterna fusca," in Insect Life, 

 I, 1888, 180-185. 



.S'/)/!77i, John B. — "Some Ne\v Species of Lachnosterna," in Bnt, 

 Amer., V, 1889, 93-99. 



S)nilh, Joint B. — "Notes on the Species of Lachnosterna of Tem- 

 perate North America with Descriptions of New Sjieeies," in 

 Proc. T". S. Nat. jrus., XI, 1888, 181-525, Pis. XLVIII-LX. 



Fall. II. C. — "Notes on Diehelonycha and Cantharis with De- 

 scriptions of new Species in other Genera," in Trans. Amer. 

 Ent. Soc, XXVII, 277-292. 



Fall. H. f. — "Revision of the Species of Diplotaxis of the 

 rnited States," in Trans. Amer, Ent., XXXV. 1909, 1-97. 



KEY TO INI)T.\XA GENERA OF MEI.aLO?;TI-IIN,E. 



a. Middle and liiud tibiic with only one spur, this smuetiuies obsolete; 

 tarsi without setie-bearing iirocess between the claws; hind tarsi with 

 a single claw; body scaly. XVIII. Hopua. 



aa. Middle and hind tibire with two spurs; all tarsi with two equal claws 

 and a distinct setje-bearing process between them. 

 6. Form elongate, slender; colors metallic gncn or bronzed (at least in 

 part) or dull yellow. 

 c. Elytra pubescent, ncjt densely scaly: claws chelate, i. e., capable 

 of being folded along the last .joint of the tarsi. 



XTX. Dichelonycha. 

 re. Elytra (Iciiscly cuvered with cloiiixate yelldwish scales; tarsal daws 

 not chelate. XK. Machodac tym's. 



hh. Form robust, heavy; eohir brownish, sometimes iridescent. 



(I. Ventral se^'uients five; elytra either uniformly and rather tinely 

 punctured, (jr with lanietured stria'. XXI. Diplotaxis. 



(hi. A^entral scKuients six. 



r. Elytra with rather indistinct but regular sulci or grooves on the 

 dislc; ventral segments free; size small, not over 10 mm. 



XXTI. Serica. 



cc. Elytra without stria^ or grooves e\er llie great portion of the 



disk; ventral segments cdunate; size lavLrer. 11.5 or more mm. 



XXII 1. 1/ACHNOSTEHNA. 



