* i 
The Rev. Wm. Krnny on a new Order of Insects. 108 
circumstance which induced me formerly to consider them as 
analogous to the labial palpi of Latreille: these palpi, which are 
biarticulate and very conspicuous, appear to be inserted in the 
head itself just exterior to the mandibule. In my specimens, 
which are in an imperfect state, I have not been able to detect 
any mouth or lips, though there is something like an upper lip in 
Stylops Melitte ; and Professor Peck could see nothing but a de- 
pression under the head *, though he had the advantage of recent 
specimens. So that the catalogue of the parts of the mouth is 
short indeed ; mandibule only, and what may be regarded as 
analogous to maxillary palpi ; and these situated, both with rela- 
tion to each other and to the usual place of the same organs in 
other insects, in a manner perfectly unique and peculiar. This 
tribe, therefore, seems to be intermediate between the two grand 
classes above alluded to, the masticators and suckers, and to 
belong to neither; and therefore cannot be arranged in any of 
the Fabrician orders. | PTS i o DS 
I shall now advert to such of their remaining characters as 
are most peculiar and remarkable. Their antenne in this re- 
spect first catch our attention, which after two or three com- 
mon joints divide into two branches nearly equal in length, thus 
giving the insect a very unusual appearance} : but this circum- 
stance, singular as it is, is not altogether peculiar to this 
tribe; many both coleopterous and hymenopterous insects have 
branching antenite ; their branches, indeed, are commonly late- 
ral processes issuing from a main stem, but in Tenthredo furcatust 
they are equal branches ; in Gyrinus the antennze also are bipar- 
* Tas. VIII. fig. 9. c. | 
+ Tas. IX. fig. 10. b. c. fg. 11.12. Kirby Monogr. Ap. Angl. tom. i. tab. 14. 
no. 11. fig. 3.4. Sowerby’s Brit. Miscell. no. 9. plate 45. fig. 5. aa. bb. , 
t Coquebert Illustr. Ic, Dec, 1. tab. iii, fig. 4. 
tite, 
