LARVAL FORMS Of^ fOLEOPTERA 



38. Abdominal spiracles located in disklike scleromes. (Urop-onii)lii 



branched, with the inner prong directed toward the sajjittal 



line) Eurijstethidae {-Aegialitidae ) 



(pi. 48 A-F) 

 Abdominal spiracles not located in disklike scleromes 39 



39. ]Mandil)le without molar structure. (Larva parasitic and 



])livs()«iastric) Bothrideridae {Deretcrphrus and 



Bothrideres) (pi. U F-X) 

 Mandible with molar structure 40 



40. Larva elon<iate, cylindrical or subcylindrical, or more fusiform. 



(Body Avell chitinized or fleshy; urogomphi present and 



corniform, or absent) 41 



Larva elongate and strongly depressed with parallel sides. 

 (Body smooth and shining; urogomphi always r)resent and 

 often of ver}- distinctive shape) 49 



41. Cardo simple 42 



Cardo divided into two parts 44 



42. Hypopharynx only slightly or not chitinized ; mandibles sym- 



metrical. (Mola of mandible depressed with a ventral grind- 

 ing surface ; presternum of prothorax subtriangular ; often 

 with a small pit between bases of urogomphi) 



Colydiidae ( Colydiin i, Syn ch i- 

 tini and, probably, Monoedin i ) 

 (pi. 49 A-M) 

 Hvpopharvnx with a sclerome at base; mandible asymmetri- 

 cal * 43 



43. Mola of mandible depressed, and with a grinding surface on 



the ventral side or on both the dorsal and ventral sides. 

 (Presternum of prothorax usually elliptical and trans- 

 verse) Mycetophagidae (pi. 50 A-T) 



Mola not depressed, and with a grinding surface facing the 

 buccal cavity 53 



44. Urogomphi present 45 



Urogomphi absent. (Paired ambulatorial warts usually well- 

 developed dorsally and ventrally on anterior body segments ; 

 mandibles asymmetrical) ..Oedemeyklae-Oedemerinae (pi. 



51 A-F) 



45. Ambulatorial warts present ventrallj" on second to fifth ab- 



dominal segments. (Mandibles symmetrical; urogomphi 

 simple and curved upward, a pit present between their bases ; 



group Anthicidae and the mandibles and hypopharyngeal sclerome 

 in the Byturidae are rather similar to the same structures of the 

 Languridae (pi. 28 I, J, N) indicating close affinity between these 

 families. 



40 



