218 Artlmr M. Lea : 



tures in the middle, and the spur of the front tibiae is smaller 

 and does not quite extend to the base of the apical tooth, and 

 the two hind teeth are less acute. Length 23, width 13 mm. 



Hab. — Queensland : Cape York, in a lai'ge nest of white ants 

 (H. Elgner). 



Close to crassus, but cephalic horn of male stouter (except at 

 the base, where it is much thinner), shorter and very distinctly 

 bifid, instead of rather obtusely bilobed (compare figures 50 and 

 52) ; prothoracic excavation with parallel sides instead of almost 

 circular in outline (compare figures 53 and 54), the excavation 

 itself with comparatively sparse and more or less rounded pimc- 

 tures, instead of with very dense and more or less transverse 

 ones. The teeth of the front tibiae are also more acute, with 

 deeper notches betw^een them, whilst the spurs are shorter and 

 thinner. The female differs from the female of crassus in having 

 the horn larger and bifid, scutellum with punctures on basal half 

 only, front tibiae with larger and more acute teeth, but the spur 

 on each much smaller and less conspicuous. Crassus is a fairly 

 common species in W. Australia, where it occurs in the rotting 

 cores of species of Xanthorrhoea. Adelaidae, described as close 

 to crassus, is stated to have the head of the female without i\ 

 horn ; striatojiunctidatus as with the scutellum densely punctate 

 and prothorax not wider than elytra. The other described species 

 have the cephalic horn simple. Of rugnsicoUis only the female 

 has been described (and it is the only sex known to me), but it 

 also has the cephalic horn simple. 



Mr. Elgner saw numerous larvae and pupae in pupal cases in 

 the nest, and sent one of the pupae for examination, in addition 

 to the. beetles themselves. 



Elateridae. 



TetraJobus, sp. 



Mr. Elgner has sent a very fine species of this genus as from 

 a large nest of white ants at Cape York, but for want of the 

 necessary literatui-e 1 have been compelled to leave it unnamed 

 at present. 



