LAKVAL FOmrs OF rOT.FOPTERA 



SERIES OR SUPERFAMILIES 



Tlie Arrhosiemuia includes one family series: A, Cupesoidea. 



The AdrpJiaga includes three family series: B, Caraboidea ; C, Gy- 



i-inoidea; and D. Paussoidea. 

 The Pohfphagd includes eig'liteen family series: E, Staphylinoidea ; 

 F, Ilydrophiloidea ; G, Cucujoidea ; H. Byrrhoidea ; I, Das- 

 cilloidea ; J, Dryopoidea ; K, Cantharoidea ; L, Elateroidea ; 

 M, Searabaeoidea ; N, Cleroidea ; 0, Meloidea ; P, Mordel- 

 loidea ; Q, Cerambycoidea ; R, Bostrichoidea ; S, Chrysome- 

 loidea ; T, Platystomoidea ; U, Cureulionoidea ; and V. Ly- 

 mexyloidea. 

 The sequence in which the different family series have been cata- 

 logued above and will be treated in the subsequent parts of the 

 paper, except in the key to the series immediately following, inti- 

 mates a natural arrangement of the series according to the presumed 

 relationship of their larval types (pi. 125). 



Key to Series 



1. Leg six-jointed with tarsus distinct and one or two distinct, 



movable claws presenf' 2 



Leg either five-jointed with tarsus and claw fused into a single, 

 claw-shaped, terminal tarsungular joint, or less than five- 

 jointed, or vestigial, or absent^ 4 



2. ]\Iandible with molar structure ; hypopharyngeal sclerome 



fused with prementum and ligula into a strongly chitinized 



unit Cvi)esoidea (p. 16) 



Mandible of the grasping type without molar structure, hypo- 

 pharyngeal region membranous and not fused with pre- 

 mentum and ligula 3 



3. Cardo of normal moderate size or small ; prementum having 



stipites labii fused at least proximal ly. (Tenth abdominal 

 segment usually not armed with large hooks ; spiracles usu- 

 ally present) Caraboidea (p. 16) 



Cardo very large ; prementum having stipites labii completely 

 separated. (Tenth abdominal segment armed with four long- 

 hooks; spiracles absent; lateral gills present; mandibles per- 

 forate) Gijrinoidea (p. 24) 



''Except in the instars of MicydmaUhus which are legless or 

 have three-jointed legs. 



' For further discussion and information see: Snodgrass, R. E., 

 Morphology and INIechanism of the Insect. Smithsonian Miscel- 

 laneous Collections, vol. 80, no. 1. li)27, pp. 93-98. 



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