NO. 6 



GRASSHOPPER ABDOMEN — SNODGRASS 



17 



lobe (A, vl) is unusually large and ensheaths much of the dorsal lobe. 

 The endophallus has the typical form (D, Enph), with well-developed 

 apodemes (ze^) and gonopore processes (y). 



Locusfa migratoria L. — The aedeagus of Locusta migratoria is 

 quite different in shape from that of the other species here described, 

 but its peculiarities may be seen as an exaggeration of the structure in 

 Camnula. The ventral lobe is very large and, in the retracted position 



Fig. ^2. — Male genitalia of Locusta migratoria (Oedipodinae), and acridid 

 spermatophores. 



A, phallic organs on floor of genital chamber, with endophallus and ejaculatory 

 sac beneath the latter. B, dorsal lobe of aedeagus, with aedeagal apodemes and 

 endophallus exposed by removal of floor of genital chamber and ventral lobe 

 of aedeagus. C, aedeagus in protracted position, with protruding spermatophore 

 (Sphr). D, spermatophore of Locusta migratoria. E, spermatophore of Cal- 

 liptamus ifalicus. (C, D, E from Boldyrev, 1929.) 



of the phallic organs (fig. 32 A), completely conceals all but the 

 terminal parts of the dorsal lobe. Its upturned lateral walls contain 

 each a large quadrate plate (vl) lying in a vertical plane at the side 

 of the base of the dorsal lobe ; ventrally the two plates are united by 

 a median membranous area of the lobe. When the ventral lobe is 

 removed (B) the dorsal lobe of the aedeagus (dl) is seen to have the 

 form of a long, tapering tube, curved upward and ending in four 

 slender apical processes. The organ, however, is not literally tubular, 

 since the posterior wall is deeply cleft to its base : the opening is the 



