1921] Boving: Larvae and Pupae of Social Beetles 203 



Second antennal joint one-third as long as head; 

 upper ocellar group with two ocelli, lower with 

 four 5 



3. Mandible apically quadrifid ; individual ocelli in each 



group well separated ; body well chitinized, with 

 dark brown chitinous shields (Plate VIII, fig. 

 18), Nausibius Redt. 

 Mandible apically trifid; individual ocelli in each 

 group almost confluent; body thinly chitinized, 

 with pale yellowish shields 4 



4. Maxillary palp with length of basal, second and apical 



joints as 1:1:2 Silvanus Latr. 



Maxillary palp with length of basal, second and apical 

 joints as 1:2:2 Oryzaephilus Gangl. 



5. Dorsal shields of abdomen with one long seta on 



each side; body very thinly chitinized, creamy 

 white (Plate VII, fig. 1), 



Coccidotrophus Schw. and Barb. 

 Dorsal shields of abdomen with two long and a few 

 short setae on each side; body thinly chitinized, 

 light grey (Plate VII, fig. 3), 



Eunausibius Grouvelle 



C. — Coccidotrophus Socialis and Eunausibius Wheeleri. 



C 1. — General morphological description of the larvae. 

 (Plate VII, figs. 1-8, Plate VIII, figs. 9-11, 13, 16-17) 



Orthosomatic with dorsal and ventral sides of body equally 

 developed ; thoracic segments not twice as long as seven anterior 

 abdominal segments ; lateral sides of body nearly parallel, taper- 

 ing from eighth abdominal segment posteriorly. Legs ambula- 

 tory, of equal size, of medium length and strength; five-jointed, 

 with tarsus and claw fused. Thoracic and abdominal terga not 

 plicate, tergal areas forming shieldlike region. Segments 

 smooth, without gills, thorns or thick pubescence, setae on both 

 thoracic and abdominal segments. Ten abdominal segments 



