VI 



ANTENNATA MOUTH PARTS 



449 



mcf. 



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

 he coiled up. In the Macroh'jiiifujitcra 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 Xjihingina and many Mliofnt- 

 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- 

 inf /to/it' ra. At the head of the series 

 stands the Tcnthrcdinidce, whose mouth parts -<show great agreement with those of 

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



flni. 



FIG. 80S. Mouth parts of a Tenthredo larva. 

 Lettering as before. 



Fic.-SOO. A, Mouth parts of the Hymenoptera (Apis melifica). B, The two pairs of maxillae. 

 au, Facet eye; a, antenna; Ibr, upper lip; md, mandible; cp, epipharynx ; mxi, anterior maxilhr ; 

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

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

 cardo ; sm, submentuin ; m, mentuin ; stm, stem (stipes) of the anterior maxilte. 



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 



