LARVAL FORMS OF COLEOPTERA 



G. CUCUJOIDEA 



Key to Families and Subfamilies 



1. The back of the mandible either with two hjiiy', flagellate setae 



distally. and tiie body of the mandible partially fleshy or 

 fully chitinized ; or the back of the mandible without long- 

 setae distally, and the bodj' of the mandible always fleshy, 

 only with the base, or the tip and the base chitinized. 



(Maxillary mala entire) Lathridiidae,'^^ major part (pi. 



25 A-J) 

 The back of the mandible without long, flagellate setae dis- 

 tally, and the body of the mandible completely chitinized 2 



2. Maxillary mala with distinguishable lacinia and galea 3 



Maxillary mala entire, sometimes bilobed anteriorly 5 



3. Second antennal joint more than four times as long as the 



basal joint Lathridiidae*^ minor part 



{Eufallia) (pi. 25 K, L) 

 Second antennal joint subcylindrical, three times, or less, as 

 long as the basal joint 4 



4. Spiracles annular, not on tubes; urogomphi not distinct 



Encinetidae*^ (pi. 26 A-H) 

 Spiracles bif orous, on tubes ; urogomphi strong 



Derodontidae (pi. 27 A-H) 



5. Mala falciform 6 



Mala obtuse, or with inner margin irregularly jagged 14 



6. Spiracles bif orous 7 



Spiracles annular 11 



7. Spiracles, at least some, borne on tubes ; urogomphi terminat- 



ing abruptly with two or three conical processes. (A para- 

 median process present in front of each urogomphus) 8 



Spiracles not on tubes; urogomphi terminally pointed and 

 simple, or urogomphi absent. (Usually without paramedian 

 processes) 9 



8. Labial palpus one-jointed. (Tergal plates armed with series 



of chitinous tubercles with a small, fan shaped hair on the 



top ) Monotomidae*^ {Europs and 



Hesperohaenus but not Smi- 

 crips) (pi. 25 M-U) 

 Labial palpus two-jointed Bhizopliagidae (pi. 28 A-G) 



9. Mandible with three apical teeth. (Cutting edge between 

 *^ Apart from the lack of jointed urogomphi, the larva of the 



Eucinetidae agrees with the larval form of the leptinid association 

 of the Staphylinoidea. Usually the family is placed as a sub- 

 family of the Dascillidae. 



^^ The genus Smicrips, usually placed in the Monotomidae, con- 

 stitutes a separate family, Smicripidae (p. 36-°), near the Phala- 

 cridae according to the characters of the larva. 



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