VI 



ANTENNATA— MOUTH PARTS 



449 



of the 2 pairs of maxillfe fit together to form a sucking proboscis which can easily 

 be coiled up. In the Macrolepidoplera the mandibles have disappeared, but the 

 sucking proboscis formed by the 2 

 ridges of the anterior maxillEe is on 

 the contrary very strongly developed 

 and capable of being coiled. The ^ 

 maxillar and labial palps are nearly cf- 

 always retained, the former generally 

 in a very reduced condition (1-jointed 

 in the Sjjhingina and many Ithojm- 

 locera). In some of the latter the 

 maxillar palp has, however, al- 

 together disappeared. 



A series analogous to that of the 

 Lepidoptera is afforded by the Hy- 

 inenoptera. At the head of the series 

 stands the Tenthredinidce, whose mouth parts show great agreement with those of 

 the Micropterygina. Besides the mandibles which, as in the other Hijimnoptera, 



Fio. 30S.- 



-Moutli parts of a Tenthredo larva. 



Lettering as before. 



JTll 



Fig. 309.—^, Mouth parts of tlie Hymenoptera (Apis melifica). B, The two pairs of maxillse. 

 au, Facet eye ; a, antenna ; Ibr, upper lip ; wd, mandible ; ap, epipharynx ; ma:j, anterior maxillas ; 

 'pm, palp of the same; mm, the fused ridges of the same; ^(7, paraglossa=outer ridge of the 

 posterior maxlUse (labium or lower lip) ; li, tongue (glossa)= inner ridge of the posterior raaxillEe ; c, 

 cardo ; sm, submentum ; m, mentum ; stm, stem (stipes) of the anterior maxillaj. 



are adapted for biting, we find anterior maxillfe, on whose basal portions 6-jointed 



palps and 2 maxillar ridges are quite distinct. On the posterior maxilla (lower lip) 



VOL. I 2 G 



