Introduction to Animal Morphology. 405 



6. Amphibioticce with aquatic larvx. 10. Perlidae 

 "body long, flat, with bristle-like antennae, lateral eyes, equal 

 thorax rings, large hind wings, and a ten-ringed abdomen ; 

 -aquatic larva has hypo-thoracic tracheal gills, which arc 

 retained during life by Pteronarcys. n. Ephemeridx 

 delicate, soft-skinned ; eyes large in the males, small in 

 the females; mouth rudimental ; mesothoraxlong; fore wing 

 large, triangular ; hind wing small, or none (Ccenis). After 

 the last moult it only lives a few hours ; but the larva, which 

 has strong jaws, and large lateral gills, lives 1-2 years in 

 water. 12. Libellulidae (Dragon-flies) body long; wings 

 delicate, equal, large, netted ; jaws large, covered by the 

 large upper lip; prothorax small; abdomen 9-11 -ringed; 

 larva; with external (Agrion, &c.) or intestinal gills, and an 

 elongated tongs-like labium (mask), which may be joined to 

 the other parts of the head. 



CHAPTER XLVIII. 



SUB-CLASS 2. HOLOMELABOLA. 



TS with full metamorphosis, and a pupa stage: 

 :\ are included eight orders. 



Order 7. Neuroptera prothorax free ; tarsus five-jointed ; 

 mouth masticatory, with cleft labium, bearing a three-jointed 

 palp ; wings membranous, equal, the hinder never folded ; 

 body long; head short; eyes rarelv very lar^e ; antenna 

 many-jointed, thread-like, convoluted (Panorpa); suctorial 

 Stoma --nt (ilml.) ; ovari mnnrroi: 



ticillatc, or p. rOUi, The 



famili' club-shaped ; head 



.!, ligula undivided ; larva; with lar^e hrads an.i sucking 

 idil "" Ant-lion, whose larva lives 



in funnel-like sand-burr ;.in:, r whatever falls tl. 



