92 MR. R. W. JACK ON THE LARV^ 



Larva. — Greatest length not ascertained, but recorded up 

 to 50 mm. Colour, youno-er specimens reddish brown ; older 

 specimens deep brown ; very young specimens whitish. 

 General form cylindrical, not constricted between the seg- 

 ments. General appearance smooth and shining. Mandibles 

 project in front of labrum, but head more convex in profile 

 than in preceding genera, so that the mouth-parts are carried at 

 a lower angle and therefore less prominent. Anterior pair 

 of legs fossorially developed : tarsal claw without projections. 

 Anal segment entirely smooth except for minute punctation, 

 and shaped like the pointed end of a fowPs Qgg ; pseudopodia 

 w^anting. 



The larva of Anomalipus is entirely distinct from that of 

 other known Tenebrionidse. The comparatively large size of 

 the ovum is also worthy of note. 



The food habits of the larvae are not well known ; they 

 wall eat potato tubers. The life-history has also not been 

 followed, but the adults emerge and the ova are laid at the 

 commencement of the rains. 



(Jo) GoNOCEPHALUM. — Species studied determined as 

 G. aequale, Er.^ and G. simplex, F. 



(a) G. sequale. 



Ovum. — Dimensions 0*87 mm. by 0*54 mm. Opaque 

 white ; rounded. 



Larva. — From adults apparently indistinguishable from 

 one another two distinct types of larvae have been bred. 



Whether this indicates two distinct species of Gonoce- 

 phalum or not it is difficult to say. The larvse are here 

 described as Type No. 1 and No. 2. 



Type lYo. 1. (Plate IV. fig. 1 ; Plate Y. fig. 1 ; Plate VI. 



fig. 1). 

 Attains a length of 18-20 mm. Colour usually whitish 

 yellow, but may be more or less tinged with a smoky hue. 

 General form nearly cylindrical, not constricted between the 

 segments. General appearance smooth and shiny. Man- 

 dibles not projecting beyond the labrum. Anterior pair of 



