LARVAL FORMS OF OOLEOPTERA 



6. Mandible witlioiit ventral accessory condyle ; antenna and 



maxillary palpus two-jointed; abdominal terga without 

 numerous sjiines or hairs ; dorsal and ventral anal lobes 

 small, vcnti'al lobe with a pair of el()n<»'ate lanceolate pads 



FassaJidae (pi. 87 E-H) 

 ]Mandible witli accessory ventral condyle; (pi. 88 J) antenna 

 and maxillary palpus more than two-jointed; abdominal 

 terg-a with numerous spines or hairs; dorsal anal lobe semi- 

 circular, ventral anal lobe laterally grooved and much 

 broader than dorsal Geotrupidae 



7. Lacinia and galea separate 8 



Lacinia and galea fused 16 



8. 8tridulating organs absent (pi. 87 X) 9 



At least maxillary stridulating teeth present (pi. 87 V) 10 



9. Labrum sometimes anteriorly bilobed with a median emargi- 



nation, usually subtriangular with rounded corners ; anal 

 lobes swollen, the dorsal entire, the ventral with median 

 groove; (pi. 87 M, T) raster"" without longitudinal or 

 transverse series of setae ; some species with biforous spira- 

 cles, as found in Trox scaber L. from Europe (pi. 87 Q, R) 

 Trox unisiriaius Beauvois and Trox aequalis Say, others 

 with cribriform spiracles, as found in Trox oUgonus Loomis 

 (pi. 87 S) ; claw long and pointed, antenna with three joints, 

 two normal and the terminal minute 



Trogidae (pi. 87 L-T) 

 Labrum with distinctly multiserrate anterior margin ; anal 

 lobes normal ; raster''" with a single transverse row of 

 spatulate setae ; spiracles cribriform ; claw normal ; antenna 

 four-jointed Acanthoceridae (Cloeotus) 



10. Dorsal and ventral anal lobes swollen. (Ventral lobe medianly 



divided by a longitudinal groove) 11 



Anal lobes not particularly swollen. (Anus transverse and 

 straight, or V-shaped) 15 



11. Legs incomplete, claws absent or minute on all legs; abdomen 



strongly humped dorsally 12 



Legs complete, with normal claws ; abdomen not humped 14 



12. Legs distinctly two-jointed (consisting of a long coxa and a 



still longer, strongly pointed joint with a terminal seta ; 

 terminal joint with shallow, annulate constrictions but not 



bent at the middle) Scarahaeidae-Coprinae, pari one 



(Ofithophagiis) 

 Legs distinctly or indistinctly three-jointed 13 



13. Coxa, fenuir, and tibia distinct and all of the same length; 



tibia conical and ending bluntly; no claw 



Scdrahaeidde-Copriuac, part tiro 

 (Canthon) 

 '" The term "raster," meaning a rake, applies to a spinose area 

 on the ventral side of the tenth abdominal segment (pi. 8S A, C, H). 



52 



