24 



ZOOLOGY DIRECTIONS 



.tip, often overlapping. Month parts formed for sncking 

 (see figs. 1 to 5) order hemiptera 



r^antermax 



'Fig. 6 Fig. V Pig. 8 Fig. 9 Fig. 10 



Larva of a water Water scaveng- Predacoous Larva of pre- Whirligig 

 gcavenger beetle er beetle vra.ter beetle daceous beetle beetle 



9 (8) Front wings of same texture throughout, horny or 

 leathery (elytra) always meeting in a straight line down the 

 middle of the back (see fig. 7) order coleoptera 



10 (7) Two pairs of wings similar, membranous 11 



11 (12) Last joint of the tarsi bladder-like or hoof -like in form 



and without claws order phtsopoda 



12 (11) Last joint of tarsi not bladder-like 13 



13 (14) Wings entirely, or for the greater part, clothed with 



scales. Mouth parts for sucking order lepidoptera 



14 (13) Wings transparent and naked or thinly clothed with 



scales 15 



15 (16) Mouth parts a jointed tube for sucking, arising from 



hinder part of ventral surface of head 



order hemiptera (Homoptera) 



16 (15) Mouth parts not united to form sucking beak. Wings 



net veined with very numerous veins and cross veins.... 17 



17 (24) Tarsi of less than five segments 18 



18 (21) Antennae inconspicuous, awl-shaped, short, slender.. 19 



