82 



INSECTA 



(a) How many rows? 



(b) How many eggs (ova) in one row? 



(c) How many ova in all? 



(d) If each ovum had matured into a grasshopper, how 



manj'^ individuals would have descended from this 

 insect in five years, barring accidents to the ova 

 or to the young? 

 (2) Trace oviduct to ovipositor. 



Fig. 3. — Internal anatomy of Caloptenus femur-rubrum: at, antenna and 

 nerve leading to it from the "brain" or supra-esophageal ganglion (sp); 

 oc, ocelli, anterior and vertical ones, with ocellar nerves leading to them 

 from the "brain "; ob, esophagus; m, mouth; lb, labium or under lip; if, 

 infra-esophageal ganglion, sending three pairs of nerves to the mandibles, 

 maxillae, and labium respectively (not clearly shown in the engraving); 

 sm, sympathetic or vagus nerve, starting from a ganglion resting above 

 the esophagus, and connecting with another ganglion {sg) near the hinder 

 end of the crop; sal, salivary glands (the termination of the salivary duct 

 not clearly shown by the engraver) ; nv, nervous cord and ganglia ; ov, 

 ovary; ur, urinary tubes (cut off, leaving the stumps); ovt, oviduct; sb, 

 sebaceous gland; be, bursa copulatrix; ovt', site of opening of the oviduct 

 (the left o\aduct cut away) ; 1-10, abdominal segments. The other organs 

 labeled in full. (Drawn from his original dissections by Mr, Edward Bur- 

 .) (From Packard's Zoology.) 



The Digestive System. 



(1) The Mouth. 



(a) Location? 



(b) Shape? 



(c) Size? 



(d) Mouth-parts present? 



(2) The Tongue. 



(a) Shape? 



(b) Size? 



(c) Color? 



(d) Use? 



