36 INTRODUCTORY REMARKS. 



are described as bifid and rounded at the apex, 

 and the labium (lingua) cylindrical and emargi- 

 nate. In such, aculeo exerto, as I have examined, 

 the exterior palpi are quinquearticulate, with the 

 second joint larger than the rest and trapeziform(?). 

 The labium is cylindrical, but not, so far as I could 

 discover, emarginate (i^). In those whose aculeus 

 is not exerted, the palpi are the same nearly as the 

 other (/), but the tongue is semicylindrical, and the 

 valvules are concave and truncate at the apex(m). 

 His character of Sphex is probably taken from 

 j4mmophila Vulgaris. He gives the interior palpi 

 as quinquearticulate, and the labium as depressed, 

 cylindrical and emarginate at the apex. In all the 

 Ammophil(B \h?A. I have examined, the interior palpi 

 are quadriarticalate (n), the valvule have a semi- 

 sagittate apex (o), and the tongue is tubular, cla- 

 vate, and cleft at its summit, the fissure being 

 much the deepest on the upper side (p). In Tiphia 

 liis character assigns five articulations to the in- 

 terior palpi, and represents the labium as cylin- 

 drical. In Tiphia femorata the latter of these is 

 flat (^), and the number of joints of the interior 

 palpi never exceeds four in any genus in this class, 

 at least as far as I have examined it. The valvules 

 of his Chrysis are acute, mine has them obtuse (r) : 



(i) Tab. 14. N° 2. fig. 2. c. {k) Ibid. fig. 3. Cl) Ibid. 

 fig. 1. a. (7/i) Ibid, e, c. (//) Ibid. N° g. fig. 1. e. (o) Ibid, 

 fig. 3. d. (p) Ibid. fig. 2. (7) Ibid. N° 10. fig. 1. l>. 



(r) Ibid. N° 6. c. 



and 



