HOW TO KNOW THE IMMATURE INSECTS 



25a. Head capsule directed distinctly cephalad 31 



25b. Head capsule directed ventrad or somewhat cephalo-ventrad. . . 26 



26a. Usually with one or more distinct cephala-coud- 

 al folds or depressions on the lateral and ventro- 

 lateral aspects of the abdominal segments; body 

 U-shaped. 

 Fig. 78 Order COLEOPTERA page 72 



Fig. 78. Black 

 Hills beetle, 

 Dendroctonus 

 ponderosoe 



Hopk. 



26b. Usually without such folds or depressions on lateral or latero- 

 ventral aspects; body not U-shaped 27 



27a. Adfrontal areas, spinneret, 1 or more pairs of 

 simple eyes and prolegs with crochets usually 

 present. Fig. 79 Order LEPIDOPTERA page 149 



Fig. 79. Tischeria 

 malifoliella 



Clem. 



27b. Not so 28 



28a. Larvae may be pointed at one or both ends and 

 U-shaped; live within plant tissues, or in mud or 

 paper-like cells; one pair of simple eyes may 

 occur. Fig. 80.. . .Order HYMENOPTERA page 210 



43 



Fig. 80. Clover 

 seed chalid, Bru- 

 chophagus gib- 

 bus (Boheman) . 



