VI 



ANTENNATA MOUTH PARTS 



449 



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

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

 sucking proboscis formed by the 2 

 ridges of the anterior maxillae is on 

 the contrary very strongly developed c 

 and capable of being coiled. The 

 maxillar and labial palps are nearly 

 always retained, the former generally 

 in a very reduced condition (1 -jointed 

 in the Sphingina and many Rhopa- 

 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- 

 menoptera. 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 Hymenoptera, 



fini 



FIG. 308. Mouth parts of a Tenthredo larva. 

 Lettering as before. 



FIG. 309. -4, Mouth parts of the Hymenoptera (Apis melifica). E, The two pairs of maxillae. 

 au, Facet eye; a, antenna; Ibr, upper lip; md, mandible; ep, epipharynx ; mx^, anterior maxillse ; 

 pm, palp of the same ; mm, the fused ridges of the same ; prg, paraglossa = outer ridge of the 

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

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



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



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



VOL. I 2 G 



