LARVAL FORMS OF COLEOPTERA 



15. Eiji'litli pair of abdominal spiracles wt'll-developed and dorsal, 

 ill some genera biforons, in otliers annular, eighth abdominal 

 segment terminal, with free hind margin 



Hispidae (pi. 115 A-K) 

 Eighth pair of abdominal spiracles vestigial ; tergum of eighth 

 abdominal segment often provided with an upright fork 

 bearing the east skins or the excrement of the larva (pi. 116 

 G) Cassididae (pi. 116 A-I) 



T. PLATYSTOMOIDEA 



Key to Subfamilies 

 1. Legs present, one-, two-, or three-jointed, always without a 

 claw-shaped tarsungular joint. (Spiracles annular, unifor- 



ous, or biforous) Platystomidae - Brachijtarsinoe 



(pi. 117 A-K) 

 Legs absent, semiglobular pedal lobes occupying their place. 

 (Mesothoracic spiracle biforous (pi. 117 0, N) ; abdominal 

 spiracles uniforous ; body profusely covered with long 



hairs) P la t y st o m i d a e-Clioraginae 



(Araecerus) (pi. 117 L-Q) 



U. CURCULIONOIDEA 



Key to Families and Subfamilies 



1. Mentum-portion of fused subfacial region free laterally ; legs 



present, but small, and usuallv two-jointed 



Brenthidae (pi. 118 A-G) 

 Mentum connected laterally with maxillary stipes ; legs absent ; 

 pedal lobes, occupying their place, often bulging 2 



2. Head capsule elongate, broadening posteriorlj^, and with 



straight sides. (Head deeply retracted; spiracles uniforous 

 with the mouthpiece equipped with a spoutlike prolongation 



(pi. 119 A) Proterhinidae (pi. 119 A-H) 



Head capsule narrowing posteriorly, and with curved sides ... 3 



3. Abdominal hypopleurum subdivided into at least two lobes, 



one superposed upon the other 7 



Abdominal hypopleurum not subdivided 4 



4. Abdominal segments with no more than two transverse, dorsal 



l)licae 5 



Abdominal segments with three or four transverse, dorsal 

 plicae 6 



5. ]More than two ocelli on each side; head retracted; frons in- 



distinct ; mentum bearing a median, unpaired plate more or 

 less completely fused with a subtriangular. unpaired plate 

 borne by prementum ; labial palpus distinctly two-jointed 



Aiielahidac - Rhi/nrhifinae and 

 Attelahidae -Attchihinac (pi. 

 118 H-M) 



no 



