708 EXTERNAL ANATOMY OF INSECTS. 
distinct, being called in the table the Hypochondria. In 
Sagra and Brentus the epigastrium is particularly con- 
spicuous for its size, in the former occupying half, and 
in the latter nearly two-thirds of the under side of the 
abdomen; but in general it is distinguished from the re- 
maining segments only by the central mucro or point that 
terminates it towards the trunk’, and which is received 
by a sinus of the metasternum ; this point is generally mi- 
nute and triangular, but in Sagra it is large and rounded 
at the extremity, and in Calandra it terminates nearly in 
a transverse line somewhat waving. It is most remark- 
able, however, in some species of the Heteropterous 
genus Edessa ; for in E. nigripes and affinities it is a 
sharp sterniform conical horn, which passing between 
the four posterior legs covers the end of the promuscis. 
In fact this part appears a kind of abdominal sternum. 
In the Cetoniada, &c., the Hypochondria unite before 
this mucro, and form a ridge which articulates with it, 
and dips towards the abdominal cavity; in Scolytus the 
epigastrium is much elevated from the rest of the ven- 
tral segments, so that the under side of the abdomen 
appears as if it were suddenly cut off; whence Herbst’s 
awkward though not inexpressive name, Ekkoptogas- 
ter; this part in this genus has something of a posterior 
mucro. 
The intermediate: ventral segments exhibiting no 
very remarkable peculiarities, I shall pass them without 
further notice, and call your attention to the last, which 
is opposed to the podex, and which I have named the 
2 Pirate VIII. Fic. 6. B’. 
