A. W. RvMER Roberts 



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lobe of the labium approximately pentagonal, wider in front than behind, 

 bearing two long yellow setae. Labial palps two-jointed, the first seg- 

 ment with several setae near its apex. Between the bases of the palps, 

 the margin of the labium is usually somewhat produced and probably 

 represents the ligula. Mentum transverse, broader than the submentum, 

 almost membranous. Submentum almost tongue-shaped, usually strongly 



Fig. 1. Hypostome of larva (R. Green del.). c=cardo; st. = stipes; sm. = submentum; 

 m = mentum; Za6.= apical portion of labium; mji. = maxillary palp; gr.= galea; 

 lac. =lacinia. 



chitinised, with the anterior and lateral margins nearly straight, ter- 

 minating in a blunt point posteriorly. A long seta is borne at each of the 

 four lateral angles. 



Prothorax nearly as long as the meso- and meta-thorax taken together. 

 Both anterior and posterior margins of the pronotum have a border of 

 fine longitudinal striations, the anterior extending somewhat further than 



Ann. Biol, vni 14 



