LARVAL FOEMS OF COLEOPTERA 



suture ; in thorax usually carrying the two scleromes 

 episternum. anterior to the articulation of the coxa, and 

 epimeron, posterior to this articulation). 



hr, hypopharyngeal rod. 



hx, hypopharynx. 



I13', hypostomal margin (the ventral marginal thickening of 

 each of the epicranial halves between the articulation of 

 the ventral mandibular condyle and the ventral tentorial 

 pit. tp; pis. 3 F, 31 F, 99, 107 B). 



is, intersegmental membrane, 

 jca, .juxtacardo (a separate part of cardo extending from cardo 

 proper toward submentum). 



jx, juxta stipes (a separate part of stipes extending from 



stipes proper toward mentum). 

 lab, labrum. 

 lac & la, lacinia. 



lb, labium (the unit consisting of submentum, mentum, pre- 

 mentum, ligula and labial palpi). 



li, ligula and in some figures glossa. 

 Im, lacinia mandibulae (= prostheca = lacinia mobilis, a fleshy 

 or membranous process from the interior face of the 

 mandible; see: r, retinaculum). 

 Ip, labial palpus (never more than two-jointed in coleopterous 

 larvae). 

 Ipg, labial palpiger (in a few coleopterous larvae appearing as 

 a free joint; see: jDm, prementum). 

 Is, labial stipes (see: pm, prementum). 

 It, median line on the free surface of the airtubes of the 



biforous spiracle, 

 m, mentum (a labial area limited anteriorly by the posterior 

 margin of the premental area and posteriorly by a trans- 

 verse suture running approximately between the front 

 margins of the maxillary cardines). 

 ma, mala (a single maxillary lobe not differentiated into an 



outer lobe, or galea, and an inner lobe, or lacinia). 

 md, mandible. 



mo, the molar or grinding structure of the mandible, 

 mpf, maxillary palpiger. 

 mst, niesothorax. 

 mtt, metathorax. 

 mx, maxilla, 

 mxl, maxillula (=pgn). 

 mxp, maxillary palpus. 



mxs, maxillary articulating area (between stipes maxillae and 

 cardo maxillae, exteriorly, and mentum and submentum, 

 interiorly). 



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