ig SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



are stored. However, for larvae which, through rearing, are asso- 

 ciated with extant adults, there have been added detailed notes on 

 place, date, collector, record number, and other related data. 



In listing the material of each species that was examined, the follow- 

 ing abbreviations are used to indicate the institution in which the 

 material is stored : 



C.N.C. : Canadian national collection, Ottawa, Ontario. (Material stored 



temporarily in the Dominion Entomological Laboratory, Saska- 

 toon, Saskatchewan.) 



B.M. : British Museum of Natural History, London, England. 



Pa.C. : Pennsylvania Agricultural Experiment Station collection. State 



College, Pa. (Material temporarily stored with C. A. Thomas, 

 Kennett Square, Pa.) 



R.V.A.C.: Royal Veterinary and Agricultural College, Copenhagen, Den- 



mark. 



U.S.N.M.: United States National Museum, Washington, D. C. 



van Emden : Private collection of Dr. Fritz van Emden, British Museum, 

 London. 



W.W. : United States Wireworm Laboratory, Walla Walla, Wash. 



MORPHOLOGY OF A TYPICAL LEPTUROIDINE LARVA 



In conducting the study a first essential was to investigate thor- 

 oughly the structure of a typical lepturoidine larva and to develop an 

 appropriate terminology for its description. Ludius aeripennis destruc- 

 tor Brown was selected for this purpose because it was available in 

 abundance, because of its tremendous economic importance, because 

 it represented a large section of the genus Ludius, and because it was 

 an excellent example of the tribe Lepturoidini. 



TERMINOLOGY 



In developing a suitable terminology, the writer has drawn freely 

 from the works of Snodgrass (1931, 1935), Hyslop and Boving 

 (1935), Boving and Craighead (1931), and Roberts (1921, 1930). 

 Anderson (1936) has been followed in naming labial structures. 



A survey of the literature on the morphology of the larval Elateri- 

 dae reveals much confusion and uncertainty in the naming of many 

 parts. The hypopharynx, the ventral sclerites of the thorax, and the 

 segmentation of the leg have always been a source of difficulty. 



In the present study the hypopharynx is regarded as including both 

 the basal sclerome at the mouth of the pharynx and the adjoining 

 membranous area extending as far forward as the transverse fold at 

 the base of the prementum. 



