ART. -2 BEETLE LAUVAE OF GALERUCINAE BOVING 5 



an exterior fciualler one (ext). The alar area (al) and the spiracular 

 area {spi) combined into a parascutal region (pasc) above limited by 

 an indistinct sulcus marked and produced by a few dorso-ventral 

 muscles (f) to the coxal region ("the noto-coxal muscles") and 

 below by the oblique dorso-lateral sulcus (dl). Parascutal region 

 carrying two sclerites, a minor anterior (ant) or spiracular sclerite 

 in the spiracular area and a large posterior (post) or alar sclerite 

 in the alar area. Interior prescutal as well as the interior scuto- 

 scutellar sclerites arranged closely together (fig. 18) or only sepa- 

 rated in the sagittal line by a continuation of the sagittal suture of 

 the prothoracic shield (figs. 21 to 24). In Monocesta coi^/U (fig. 1), 

 all tergaj sclerites absent except the interior prescutal and interior 

 scuto-scutellar ; in Monoxia consputa (fig. 9) no sclerite developed; 

 in Galerucella nymphaeae (fig. 18) and Galerucella Uneola interior 

 and exterior prescutal sclerites fused into a single compound sclerite 



Fig. 2. — Diagram of Mesothokacic and Metathoeacic Stx;- 

 MENTs. Fon Lettering see Text 



just as the interior and exterior scuto-scutellar sclerites. The epi- 

 pleural area {epl) triangular, limited above by the oblique dorso- 

 lateral sulcus {dl) and below by the straight ventro-lateral sulcus 

 {vl), carrying one sclerite. Hypopleural sclerites (episternum and 

 epimeron) as in prothorax. The presternal, the eust-ernal. and the 

 sternellar (combined with the coxa bearing parasternal) areas well 

 limited b}" sulci but often with indistinct sclerites. Poststernellar 

 area present in mesothorax, absent in metathorax. (Fig. 5.) Meso- 

 thoracic and metathoracic sclerites usually with a few or moderate 

 number of short or medium long setae. 



The typical abdominal segments (text fig. 3) differ from the 

 mesothoracic and metathoracic segments mainly by having the dorso- 

 lateral sulcus running parallel with the ventro-lateral sulcus and not 

 obliquely toward it. The parascutal region of the thorax Avith the 

 distinct alar and spiracular areas becoming smaller in the abdomen 

 and practically fused into a single area, the parascutal area {pasc) 

 of the abdomen; the epipleural area {epi) becoming larger and 

 changing form from triangular in the thorax to rectangular in the 

 abdomen. Otherwise the arrangement of the areas and the number 

 of the sclerites in the areas are as in the mesothorax and metathorax. 



