HOW TO KNOW THE IMMATURE INSECTS 



lib. Thoracic legs 6-segmented, or phothoracic legs 4-segmented and 

 others S-segmented; prolegs on abdominal segments 2-7 and 10/ or 

 2-6 and 10, very small. Fig. 591 Family ARGIDAE 



About 200 species have been 

 known. Larvae feed on broad-leaved 

 deciduous trees and shrubs. The 

 members of this family are widely 

 Fig. 591. Hylotomo sp. scattered. 



12a. Prolegs present on the last abdominal segment, either normal or 

 fused on the meson, forming a single prominence 13 



12b. Prolegs absent on the last abdominal segment. 



Fig. 592 FamUy TENTHREDINIDAE 



"ji ] I liliTpK The subfamilies Fenusinae and Hoplo- 

 L,/:J.\iLb^ campinae are included here. A number 

 of leaf miners ore included in the spe- 



Fig. 592. Koliofenuso ulmi Sun ^ies which fall here. 

 devall (Fenusinae). 



13a. Anal prolegs normal and separated 14 



13b. Anal prolegs united on the meson forming a single protuberance. 

 Fig. 593 Family TENTHREDINIDAE 



K^I^'T^^^XiUi^^ The subfamily SoHoneurinae belongs 



^^^^^''^•'^^■■^^■^^^ here. They are leaf miners on members 



Fig. 593. Metollus rubi ^^ ^^^ 'OSe family. 



Forbes. 



14a. Antennae 5-segmented; 3rd abdominal segment with 6 aimulets; 

 10th abdominal tergimi with several caudal protuberances. 

 Fig. 594 Subfamily Hoplocampidae, TENTHREDINIDAE 



Q^^ffl^^^^E^^ The larvae feed on the leaves of 

 ^^IY?^ ^^^ pear and other Rosaceae. 



Fig. 594. Henichroa dyari Rohwer. 



14b. Antennae 4-, rarely 3-segmented; 3rd abdominal segment usually 

 with less than 6 aimulets; 10th abdominal tergimi with or without 

 caudal tuberances 15 



214 



