UY W. MACLEAY, JUN., E8(^ 11 



of Ammosin to the same section. If divisions founded on 

 the number of the apical teeth of the mandibles be adopted, as 

 suggested bj Westwood, (" Ent. Soc, Trans., Vol. 2, new- 

 series,") this will probably be found to form a new sub-genus. 

 I very much doubt, however, the value of such characters. I 

 have three specimens of this insect, two from Port Denison, cap- 

 tured like the preceding, by night, and the other from 

 Rockhampton. 



The Mcgacepliala Australasue, (Hope, Trans. Ent. Soc, 

 Vol. 4) from Port Essington, evidently belongs to this group. 



Subgenus Megacepiiala, Lati-. 

 4. — Megacephala cylindeica. 



Cyaneo-viridis mandibulis antennis pedibus abdomineque 

 piceis, elytris cylindricis punctis ad basin excavatis. 



Long. 10 lin., lat. 3 lin. 



Hab. Peak Downs. 

 The whole upper surface, and the under surface of the head 

 and thorax are of a brilliant bluish green ; the basal half of the 

 elytra is covered with small roundish depressions, and the 

 remainder is quite smooth. The mandibles, antennte, legs, and 

 abdominal segments, are of a ruddy brown hue. 



This beautiful insect was brought from Peak Downs, many 

 years ago, by Sir T. S. Mitchell. In its cylindrical, shoulderless 

 form, and brilliant colour, it closely resembles the type of the 

 genus M. Scnegalensis. It seems remarkable that we should 

 possess here in Australia, insects of -which the types are to be 

 found in Tropical Africa and South America, as is the case -nith 

 the genera Megacephala and Tetracha. It is, perhaps, still more 

 remarkable, that while all the Australian species knowm come 

 from the far North, not a single species of the family has ever 

 been found in India, or the Indian Archipelago, or indeed, in any 

 part of Asia. 



Genus Distipsidera, Westw. 



(Mag. of Zool. fmd T3ot., p. 2ol.) 



5. — Distipsidera volitans. 

 Nigra nitida subtus atro- C3^anea, labri disco lurido, elytrorum 



