w 
1884 ] Recent Literature. 1235 
| skinned extension of the head This i 
: s conical head-part (Fig. 
ij) being retrusible into the firm head-capsule A etia A 
Fig, 2.—Section of Probos- 
Fig 1.— pa 
ig .—Head of blow fly, all the figures enlarged. 
cis of the blow fly. 
rs : ; 
| rA to be the coalescing mouth-parts till Macloskie and 
part the i he plained its true nature I shall call this soft head- 
subsequent ead-cone (the basi-proboscis). The totality of the 
tthe medi parts, including labium, labrum and hypopharynx 
strict i proboscis and disti-proboscis) I call proboscis in the 
‘ enset (The so-called epipharynx has no existence.) | 
Head-pay ; i 
a? art of Proboscis (basi-proboscis, Fig. 1, bp 1 
upper A oboscis bears a pair of unsegmented palps (2) on its 
-Tuns h €, each resting on two chitin-ri (pr) 
witha > abate the insertion of medi-pro 
dons ‘ong rigid chitin-bar (one on each side, the ma 
memb ig. 4, mt) which runs backward, free under the thin covering- 
first oes of the basi-proboscis. These bars are the rudimentary 
| axillæ, whose palp-bearing part (fr) f 
i is, and the belt-like 
h the other trophi 
Aricia, 
Me . 
on tCloskie in AMERICAN NAT read before the N. J. Mi- 
 SToscopi 4 URALIST, 1880, p. 153» : 
roi eal Society, Nov. 18, 1879, and N. Y. Academy of Sciences, Dec. is 1879. 
‘Ng apparat s Inaugural Dissertation on the anatomy of the mouth-parts an 
Er us of some Diptera. Roston, 1881. 
sa, The term 
Re ani 
terms Ace quoted, and retained as conve: 
the terin 
