INTRODUCTOFxY REMARKS. 35 



1 have no other idea of Masaris than what I have 

 gained from the Masaris crahroniformis of Pan- 

 zer (e) ; but this species seems to differ from the 

 rest in having reniform or kmar eyes, a circum- 

 stance wliich distinguishes several other insects 

 without plicate wings, which might go with that 

 into one genus, though they have usually been 

 referred to Sphex or Fespa. MelUnus seems a 

 good genus, and contains the genuine petiolated 

 Spheces, and some of those that have no petiolus. 

 It might be as well, perhaps, to distinguish this 

 genus, or Crahro, by the name of Sphex. Upon 

 the genera which Fabricius has taken from Apis, 

 I shall have occasion to enlarge hereafter. 



Having examined the Instrumenta cibaria of 

 several individuals in many of the genera of this 

 class, I shall novv^ inform the reader in what respects 

 the characters of Fabricius vary from those that I 

 examined. In Tenthredo, with him the palpi are 

 all filiform, and the interior tfiarticulate. In those 

 that I inspected the exterior palpi are thickest in the 

 middle (y) ; the interior, instead of three, consist of 

 four articulations and are clavate {g). The labium he 

 describes as cylindrical and trifid at its apex. Ours 

 is rather flat with a tripartite apex {h). In Ichneu- 

 mon the exterior palpi are said to be sexarticulate, 

 and the interior quinquearticulate ; the valvula: 



(e) Panz. Fn. Germ. Init. N° 4/ Tab. 22. 



(/) Tab. 14. NO 1. %. 1 hh. ig) Ibid. fig. 2. c. 



(Ji) Ibid, fig 2. 



■n o are 



