620 



CLASS IV. INSECTA. 



being deficient. On 

 the other hand in 

 the Hymeno ptera 

 the lacinia is en- 

 larged to form a 

 piercing blade whilst 

 the galea and palps 

 are reduced (Fig. 

 374). In Hemiptera 

 (Fig. 375) and 

 many Diptera the 

 1st maxillae become 

 piercing stylets ; in 

 the former group 

 the palps are absent 

 but they are conspicuous in many flies (Fig. 376). 



The sixth segment, or seventh, according to Folsom, bears 

 the 2nd maxillae with parts similar to the 1st maxillae, but 

 the cardines are usually fused to form a median piece the 

 sub-mentum, the two stipes are more or less fused and form 



FIG. 373. Oral apparatus of Butterflies (after Savigny). a 

 of Zygaena ; b of Noctua. A antennae ; Oc eyes ; Lr 

 upper lip ; Mxt maxillary palp ; MX maxilla (first) ; 

 Lt labial palp, cut away (in fi.?. b.) 



FIG. 374. Mouth parts of 

 Anthophora retusa (after 

 Newport). A Antennae ; 

 Oc ocelli ; Md mandibles ; 

 MX maxillae ; Mxt max- 

 illary palp ; Lt labial 

 palp ; Gl ligula ; Pg 

 paraglossae. 



FIG. 375. Mouth parts of ElG. 376. Mouth parts of 



Nepn cinerea (after Sa- 

 vigny). Ul Lower lip 

 (labium) or rostrum ; Lr 

 upper lip ; Md mandible ; 

 MX maxilla (first). 



Culex memorosus (after 

 Becher). Lbr upper lip ; Lb 

 lower lip (proboscis) ; Lt 

 labial palp ; Md man- 

 dibles; Ma; maxillae (first); 

 H hypopharynx (piercing 

 weapon). 



