LARVAL FORMS OF COLEOPTERA 



Tarsiingulus short, thick, conical; raster without a pair of 

 longitudinal series of spines 



Scarahaeidae - Cetoniinae, part 

 two, {Cremastocheilini and 

 Osmodermini; the latter tribe 

 usually placed in the Trichi- 

 inae) 



N. CLEROIDEA 



Key to Families and Subfamilies 



1. Frontal sutures present 2 



Frontal sutures absent. (Apex of mandible with two or more 



teeth ; endoparasitic, physogastric larvae) 16 



2. Laeinia distally armed with one or more spurs. (Body covered 



with long or short barbed hairs) 3 



Laeinia without spurs ■ 4 



3. Paired urogomphi present ; submentum and gular areas united ; 



mandible with a stiff process and a hair brush at base 



Dermestidae - Dermestinae (pi. 



89 A-Q) 



Urogomphi absent; submentum and gular areas usually sepa- 

 rated; mandible without spur and brush at base. (Larvae 

 often with conspicuous hair tufts) 



Dermestidae - Atfageninae (pi. 



90 A-Z) 



4. Ventral mouthparts retracted. (Distance between posterior 



ends of cardines and occipital foramen usually shorter than 



frons) 5 



Ventral mouthparts protracted. (Distance between ends of 

 cardines and occipital foramen as long as frons) 8 



5. Mandible with a long, stiff prosthecal process near the middle 



or at the base of the inner margin. (Median epicranial 

 suture well developed) Meltjridae (pis. 91 A-N, 92 A- 



Mandible with a short or no prosthecal process. (Median 

 epicranial suture usually not well developed, or entirely 

 absent) ■ 6 



6. Antenna with the sensory appendix longer than the distal 



joint. (Distal joint carrying a very long and strong termi- 

 nal seta Cndae'^' (pi. 92 K-R) 



Antenna Avith sensory appendix shorter than distal joints, or 



absent 7 



^® According to the characters of the imagines, the systematic 

 position of this family is not clear, but usually it is placed in the 

 series Bostriehoidea. In the larvae, the division of the mala into 

 a lobe-like galea and a smaller laeinia hidden below the galea sug- 



55 



