XXXli, '21] ENTOMOLOGICAL NEWS 195 



ventral side of the mandible. Antenna consisting of four joints. Legs 

 all well developed, gradually increasing in length from first to third 

 pair. Anterior abdominal segments dorsally with three transverse 

 areas. Maxillary palp four-jointed (Schiodte say--: "three jointed," 

 interpreting the basal joint as palpigcr). No (or one) ocellus \\yln- 

 ryctcs evidently has a single ocellus laterally at the base of the ant'-nnal 

 ring; this being a very exceptional development among the Scara- 

 baeids]. Mandible with manducatorial portion (= the portion with the 

 molar or grinding structures) profoundly separated from the scissnrial 

 portion (== portion with the cutting edge) ; molar structure with pos- 

 terior heel bearing a tuft of bristles. 



(By the given combination of characters the Trogini, Geotrupini, 

 Lucanini and Passalini sensu Schiodte are excluded.) 



A. Respiratory plate of spiracles surrounds the major part of hu'la. 

 Legs covered with long hair. 



(By these two characters the Copridini sensu Schiodte are ex- 

 cluded.) 



1. Maxilla with both malae [=: inner and outer lobes] completely 

 fused. Anal opening transverse and terminal. 



(By these characters the Sericini sensu Schiodte are excluded.) 



a. Scissorial portion of mandible fornicate. Labrum with lateral 

 margins of ventral side smooth. Length of antenna shorter than length 

 of head: subapical antennal joint distally truncate. Stridulating area 

 of mandible partly placed in manducatorial portion : oblong, transver- 

 sally costate, with well developed distant ridges. 



(By these characters the Rutelini and Melolonthini sensu Schiodte 

 are excluded.) 



Labrum with anterior margin broadly rounded. Claws slender, sub- 

 ulate. First six abdominal segments dorsally plicate with setae-bearing 

 tubercles densely set. Tenth abdominal segment well defined. 



Characterisation of Subdivisions and Genera of Dynasthu. 



The forms described by Schiodte as typical Dynastine larvae, 

 on which his characterization of this tribe is based, are: A'y/c 

 tr\pcs (,'idcon Linnaeus from Malayan Archipelago, Oryctcs 

 )Hisic<-n!s Linnaeus from Denmark, and Parastacia conflncns 

 \Yestwood from the Nicobar Islands. The first two larvae- 

 represent one taxonomic subdivision of the Dynastini, /'</><;- 

 stacia another. The present larva of Xyloryctcs sa'ynis Fabn 

 cius belongs to the first subdivision which Schiodte charac 

 teri/es as follows : 



l-'irst Dymistinc Subdivision. 



Inner mala of maxilla (=. lacinia ) tridentate. Pars scissoria <-t 

 mandible dentate [Schiodte has "tridentate," but as Xyl>-yctcs has only 



