— 648 — 



pair well marked, intrapodal between the prolegs, extrapodal in the 

 form of distinct sclerites with three setae each outwards the prolegs, 

 supraventral, sub- and poststigmatal all well developed, Intrapodal 

 sclerites on seventh and eighth sternites fused in one, extrapodal with 

 two setae only, sub- and poststigmatal on one sclerite. Ninth sternite 

 bearing two pairs of sclerites and three pairs of setae, located in one 

 series on the postsegmental margin; middle pair of them corresponding 

 to the intrapodal, lateral to the supraventral and intermediate to the 

 extrapodal pair of sclerites. For the distribution of setae on tenth ster- 

 nite see pi. VIII, f. 26. 



The penultimate larval instar, living in stems, differs in nothing 

 from the adult one. The instar third from the end, in reality, probably, 

 the second (pi. VII, f. 19), also differs in no important features from 

 the following instar. Epicranial sutures between postclypeus and epis- 

 tomum, as well as between hemisphaeria and sclerita fronto-lateralia 

 being not clearly defined, tubercles IX, X and XI on hemisphaeria (pro- 

 bably, also V and VI) absent, as well as the inner pair of postclypeal 

 setae. Subdorsal tubercles on meso- and metanotum bearing each but 

 one seta. Tenth tergite bearing a pair of setae more than in adult larva. 

 First larval instar, or its exuvia, not discovered, except some epi- 

 crania, belonging, probably, to this phase of metamorphosis (pi. VII, 

 f. 22) and differring only by the absence of minute hairless tubercles 

 on the fronto-lateral sclerites. 



The pupa (pi. VII and IX, ff. 27—30) elongate, about 6—7 mm 

 in length, cylindrical, pale yellowish. Head large, prominent. iVertex well 

 limited by sutures and covered with numerous straight spinules. Front 

 convex, in upper portion rugose. Occiput with anterior suture on the 

 very apex of the head, and indistinct median suture. Labrum in form of 

 an appendix of the front, bilobed at extremity. Paraclypei strongly 

 developed. Eyes highly convex, irregular in outline. Postgenae indis- 

 tinct. Maxillae well developed, reaching tarsi of fore legs. Labial 

 palpi absent (lying under maxillae), as well as the labium. Maxillar 

 palpi in form of small sclerites at upper ends of tibiae. Antennae long; 

 their scapus widened and covered with large, curved forwards spinae 

 and straight spinulae; funiculi reaching the middle of sixth sternite, 

 contiguous on the level of the fourth. Hind wing invisible. Coxa, 

 tibia and tarsus of fore leg well developed, as well as tibia and tarsus 

 of the middle one (except the apices of the tarsi) and the extremities 

 of the tarsus of the hind. 



Pronotum developed, covered with large and small erect spinae, 

 and divided medially. Mesonotum largely developed, ordinary in form, 

 covered in its anterior part with strong, curved forwards spines and 

 smaller straight spinules. Metanotum nearly as long as mesonotum, 



Revue Russe d'Entom. XV. 1915. № 4. 



