OF SOME RHODESIAN TENEBRTONIDiE. Of) 



The larv?e appear to be more superficial in tlieir habits 

 than those of G. a.^quale and are found commonly on the 

 surface of the soil under rubbish. Thev feed on docavino- 

 veo-etable matter. • 



Life-hi start/. — This has not been fully followed, but is 

 without doubt similar to that of G. tequale. Larvjs in 

 confinement attained nearly full orowth in a few months 

 during the winter. 



The species occurs on all types of soil. 



(7) Em YON. — Species studied determined as E. tristis, 

 Fhs. (Plate IV. fig. 4; Plate V. fig. 4; 

 Plate VI. fig. 4). 



Ovum. — Dimensions not recorded ; opaque white ; 

 rounded. 



Larva. — Maximum length 20-22 mm. Colour dirty white 

 to whitish yellow, sometimes a little smoky. General form 

 nearly cylindrical, slightly constricted between the segments. 

 General appearance rather dull owing to closely placed 

 short hairs on body. Mandibles rather more projecting than 

 those of Gonocephalum. Anterior pair of legs strongly 

 fossorial ; anterior tarsi without projections. The formula 

 for the spines on the inner margin of the anterior legs is 

 almost invariably 0, 1, 2, 2. The spine on the tibia is 

 sharp and prominent, those on the femur and trochjinter are 

 merely broad fiat chitinous processes. Dorsal surface of 

 anal segment strongly concave and surrounded by a sharp 

 ridge (spoon-shaped) ; chitinous projections on lateral 

 margin in form of short blunt spines; two large stout 

 recurved widely separated spines on posterior margin ; 

 pseudopodia prominent and without spines. 



Note. The adults of this species, although answering 

 accurately to Fahraeus' description of E. tristis, average 

 considerably larger in size. The dimensions given by the 

 describer are 5 mm. x 2-2*5 mm. Salisbury specimens 

 average 8 mm. x 4:'5 mm., the smallest specimen in the 

 collection being 6 mm. x 3 mm. 



