CLASSIFICATION 



but including a subpupa stage. Mouth parts suctorial. Pro- 

 thorax long. Tarsus terminating in a bladder-like organ. 



FIG. 20. 



A B 



Libellula pulchella. A, last nymphal skin; B, imago. Slightly reduced. 



Wings present, rudimentary or absent, the two pairs narrow, 

 equal, similar, with few or no veins and fringed with long 

 hairs. Abdomen with ten segments. Minute insects. EX- 

 FIG. 21. 



Euthrips tritici. Length, 1.2 mm. 



ample, Euthrips (Fig. 21). About one hundred and fifty 

 species have been described. 



