106 



ORDER HEMIPTERA 



usually' thicker and stronger than the hind pair, which are 

 concealed beneath the front ones when at rest. The abdo- 



FiG. 62. — Explanation of terms, from drawing of Athysanus obtutus: a, 

 female from beneath; b, from side; c, from above; d, female genitalia; 

 e, male genitalia; /, larva or nymph; g, eggs, showing developing larvae; 

 h, egg, enlarged; i, eggs in position beneath sheath of grass stem. Structural 

 details: ac, apical cells; a.ac, anteapical cells; cL, clavus; clyp., clypeus; cox., 

 coxa; fr., front; fern., femus; lor a, lora; ov., ovipositor; plate, plate; pr., 

 prothorax; py. (tf), ry. {P), pygofer; tar., tarsus; lib., tibia; v., vertex; 

 vs., terminal ventral segment; valve, valve. All enlarged. (After Osborn 

 and Ball.) 



men may be entirely hidden above by the wrings, but in 

 short-winged forms is more or less exposed. The parts of 

 greatest importance on the abdomen for purposes of descrip- 



