86 MR. H. W. JACK ON THE LARVAE 



Teiiebrionidae, and it is only necessary therefore to deal 

 with the characteristics which distinguish the different 

 species. The figures reproduced in the attached plates have 

 all been drawn with the aid of the camera lucida from larvae 

 bred from ova deposited in confinement. It is a little uu- 

 forhniate that, owing to some of the species of this family 

 being exceedingly difficult to distinguish, Dr. Peringuey has, 

 in one instance^ been able to supply only a provisional 

 determination. As this pa{)er deals mainly with different 

 genera, however, this is of less importance than would other- 

 wise be the case. 



The characteristics found most useful in distinguishing 

 the larv«3 of the different genera are : — 



(1) The shape of the anterior tarsal claw. 



(2) The anal segment, with regard to its form and the number, 

 form, and disposition of the chitinous processes on its dorsal 

 surface. 



(3) The presence or absence of pseudopodia on the anal segment. 



(4) The presence or absence of spines on the pseudopodia. 



The term pseudopodia is used for the retractile processes 

 termed ''ninmelon" by Lacordaire. Pseudopodia are present 

 in all the genera dealt with in this paper, except Anoma- 

 lipus. The larva of this genus is very distinct from allied 

 forms. 



In accordance with Lacordaire's classification the different 

 genera fall into the followino- order : — 



(1) ZopHOSis. — Species studied determined provisionally 

 as Z. boiei, Sol (Plate IV. fig. 5; Plate V. fig. 5 ; 

 Plate VI. fig. 5). 



Ovum. — Dimensions 1-7 mm. I)}- -6 mm. Opaque white ; 

 rounded at ends. 



Larva, — Attains a length of 2.5 nun. Yellowish white to 

 fuscous yellow in colour ; somewhat flattened dorso-ventrally ; 

 constricted rather strongly between the abdominal segments. 

 The mandibles project beyond the labrmn. The anterior 

 ])air of legs, Ji) though noticeably stouter than the remaining 

 pairs, are less fossorially developed than in many allied 



