SYNOPSIS. 



ORDER VIII. — THYSANOPTERA. 



Thripidie, 113. Plants frequented by Thrips, 113. Mouth 

 parts intermediate between mandibulate and suctorial organs, 



113. Structure of feet, 113. Fringed wings, 113, significance 

 of term " Thysanoptera," 113; similar modifications of wings in 

 Pterophorid?e and Proctotrupidae, 113. General remarks on 

 Thysanoptera, resemblance of larvae to Thysanura, 114; adults 

 more widely removed from young than adults of Dermaptera, 



114. Affinities of Thysanoptera with Hemiptera generally ad- 

 mitted, 114. 



ORDER IX. — HEMIPTERA. 



Order divisible into two groups, Heteroptera and Homoptera. 

 Anasa tristis the type of the order, 115. Plan adopted in this 

 Guide, description of type and common forms of order followed 

 by general statements, 115. Method of teaching Natural His- 

 tory, 115. Directions for collecting squash-bugs, 115. Struc- 

 ture of head, 115. Form of prothorax in correlation with 

 sucking habits of insect, 116. Characters of mesothorax and 

 metathorax, 116; liquid-secreting glands, 116. Sessile abdo- 

 men, 117. Spiracles and mode of breathing, 117. Sucking 

 mouth parts, 117; difficulties of pupils in determining their 

 number and homologies, specimens of the harvest-fly helpful, 

 117, 118, Legs adapted for walking and running, 118. Struc- 

 ture of wings, significance of term " Hemiptera," 118. Absence 

 of abdominal appendages, 1 1 8. Abundance of larvae and pupae 

 in August, 118. Structure of larva, 119; dark color of working 

 antennae, sucking-tube, and legs, 119. Thoracic rings of pupa, 

 119, 120. Aquatic Heteroptera, 121. Interesting habits of 

 Notonecta, 121 ; caution in handling, 121. Large size of meta- 

 thorax correlated with large size of swimming-legs, 121. Peculiar 

 mode of respiration, Comstock's experiments, 122. Belostoma 

 useful to teachers, 122; general structure, 122; habit of sting- 

 ing with beak, 122. Dimmock on Fish-destroying Bugs, 122. 

 Legs adapted for catching fish and frogs, 123. Mode of 

 forming a claw in Insecta contrasted with that in Crustacea, 123. 

 Destruction of young fish in the breeding ponds, efforts of the 



