84 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



\OL. 94 



Melanoplus mexicanus (Sauss.). — The general features of this 

 species are sufficiently shown in figure 38. The distal part of the 

 dorsal lobe of the aedeagus is unusually long (D, E, r) and is pro- 

 duced into two terminal lobes laterad of the phallotreme cleft. The 

 dorsal apical processes («) thus come to project anteriorly below the 

 summit of the terminal lobes. With the base of each of these processes 

 there is connected a soft padlike lobe (E, /). The ventral apical proc- 

 esses are concealed within the phallotreme cleft as in the last species. 



Melanoplus femur -rubruin (Degeer).^ — The exposed characters of 

 the male abdomen of this species are shown in figure 39. The phallic 

 organs are entirely concealed in the usual manner within the genital 

 chamber (fig. 40 B). The epiphallus (A, B, Epph) is very large, 

 especially as to its lateral lobes. Behind the epiphallus the genital 



Fig. 39.- — End of the male abdomen of Melanoplus fciiiitr-nibruin (Cyrta- 

 canthacrinae). 



A, lateral view. B, dorsal view. 



chamber floor is elevated in a large cushionlike structure, the anterior 

 part of which rests against the posterior epiphallic lobes, while the 

 deeply cleft posterior part forms a thick bilobed basal fold (bf) cover- 

 ing the basal part of the aedeagus. The aedeagus (B, Aed) consists 

 of an irregular dorsal lobe, and of a simple relatively small ventral 

 lobe (vl). The dorsal lobe shows the usual subdivision into a proximal 

 part (m) and a distal part (r), the latter bearing a single pair of 

 large apical processes (n), which, as in other species of Melanoplus, 

 are the usual anterior dorsal processes. Connected with the base of 

 each of these processes is a soft, flat accessory lobe (C, /) lying on 

 the dorsal surface of the base of the aedeagus. The ventral processes, 

 as appears to be characteristic of Melanoplus, arise deeply within 

 the phallotreme cleft (fig. 41 B, p) and only their tips appear ex- 

 ternally before the bases of the dorsal processes (A, p). The phallo- 



