FEBRUARY. 31 



short ; body robust ; mandibles strong and toothed ; 

 size small. 



ORDER VI. NEUROPTERA, Linnceus. 



Characters. Wings four, generally large, and of equal size, 

 membranaceous ; mouth with transversely movable jaws ; body not 

 armed with a sting. 



1. Psocidce. Posterior wings small ; antennae slender, long 



and setaceous ; labial palpi almost obsolete ; mandibles 

 horny and toothed ; maxillae elongated ; body short and 

 ovate ; wings deflexed, with conspicuous veins, often 

 coloured ; legs long and slender ; tarsi two- or three- 

 jointed ; size minute. Localities, trunks of trees, 

 palings, old walls, books, &c. 



2. Perlidce. Posterior wings large ; antennae nearly as 



long as the body ; labial palpi developed ; mandibles 

 rudimental ; body oblong and depressed ; head flat ; 

 tarsi three-jointed ; size moderate, 



3. Ephemeridce. Wings, hinder pairvery small ; antennae 



small ; mouth almost obsolete ; body long and slender, 

 with elongated setae at the extremity ; head small ; 

 clypeus sometimes large, and closing over the mouth ; 

 legs slender ; tarsi five-jointed ; size small. Locality, 

 near water. 



