LARVAL FORMS OF COLEOPTERA 



drical. without uncus on middle of inner margin; adhesive 

 tarsungular hair present and twice as long as tarsungulus 

 itself. (Palpiger large, somewhat jointlike; labrum fused 

 with clypeus ; urogomplii reduced to a pair of wart-shaped 



tubercles) Nifirhdiclae - Meligefhinae*' (pi. 



36 A-I) 



25. Urogomphi present, short, broad, flat, and shoe-shaped with 



tips horizontal and turned toward each other; mala with 

 uncus on middle of inner margin ; adhesive tarsungular hair 

 absent. (Mandible without lamellate, multiserrate inner 

 margin between apex and the long, strong molar part ; 



si^iracles annular) Nitichilidae - Prometopinae (pi. 



35 I, K-M) 

 Urogomphi absent; mala without uncus; adhesive tarsungular 

 hair present 26 



26. Mala well-developed and cylindrical ; maxillary palpus three- 



jointed ; cardo not longer than stipes ; no projections from 

 eighth and ninth abdominal segments. (Inner margin of 

 mandible behind apex multiserrate but without lamellate, 



lobe-shaped projection) Nitkliilidae-Cateretinae {Brach- 



ypterus, Amartus and Hefer- 

 ostomus)'' (pi. 36 J-P) 

 Mala vestigial or absent, maxillary palpus two-jointed ; cardo 

 longer than stipes, subtriangular, and separated from stipes 

 by a fine suture, both pieces membranous ; eighth and ninth 

 abdominal segments with a pair of conical and membranous 

 projections laterally Cyhocephalidae*^ (pi. 37 A-G) 



27. Mentum well develoj^ed and free to base. (Mandibles sym- 



metrical and with distinct retinaculum ; urogomphi absent ; 

 spiracles annular,- bodv with onlv fine and simple setae 



Sphindidae'^ (pi. 41 F, H-M) 

 Mentum not well developed, often fused with submentum, only 

 free apically 28 



28. Mandible with large, multituberculate or multicarinate molar 



structure; cardo proper distinct and subtriangular. (Body 

 *' K. V. Verhoeif has proposed a new family, the Brachypteri- 

 dae, including the two subfamilies, the Meligethinae and the Cater- 

 etinae, on larval characters. (Beitrage zur Kenntnis der Coleop- 

 teren-Larven mit besondere Beriicksichtigungen der Clavicornia, 

 Archiv. fiir Xaturgeschichte, vol. 89, A. Heft 1, 1928, pp. 1-109, 

 seven plates) . 



*^ The Cyboeephalidae are usually considered as a tribe or a sub- 

 family of the Nitidulidae. Larva described and figured by F. 

 Silvestri (Metamorfosi del Cyhocephalus rufifrons Reitter, Bol. 

 Lab. Zool. Gen. e Agr. R. Scuola Super. Agr. Portici, vol. 4, 1910, 

 pp. 221-227; 13 figures referring to the larva). 



37 



