253 
Genus Holoptilus. 
contained in the collection of the Linnaean Society. Gray’s de- 
scription appears to have been drawn up from General Hard- 
wicke’s drawings alone, the species not being in the collection at 
the British Museum. 
Species 4. Holopt. ( Pt'il .) affinis. 
Pallide fuscus, fusco-setosus ; antennis pedibusque luteo-fuscis ; 
hemelytrorum basi pallido, membrana apicali maxima ferru- 
ginea lineis maculisque pallidioribus inter nervos dispositis, 
macula ad marginem externum membranee apicalis versus 
basin alteraque versus apicem obscuris ; tibiis posticis in- 
terne et externe dense pilosis. 
Long. corp. (alis clausis) lin. 3|. 
Habitat in Insula Java. 
In Mus. Regal. Berol. 
DESCRIPTION OF THE FIGURES. 
Plate XXII. 
Fig. 6. Holopliltis ursus. 6 a, proboscis; 6 b, apex of antenna; 6 c, hind wing. 
7. Holoptilus (Ptilocnemus) Lemur, 7 a, head sideways; lb, fore wing ; 
7 c, hind wing; Id, intermediate tarsus; 7 e, posterior tarsus; If, 
male abdomen seen beneath ; 7 g, female abdomen seen beneath. 
8. Holoptilus (Ptilocnemus) fuscus. 
XLVIII. Notice of some Peculiarities observable in. the 
Cornea of the Eyes of certain Insects. By Robert J . 
Ashton, Esq. 
[Read 1st May, 1837.] 
The following two or three observations relating to some facts 
connected with the organ of vision in certain insects, which, as 
far as I am aware, have not heretofore been noticed by entomo- 
logists, I have thought it right to lay before the Society, in order 
to draw attention to the subject, and perhaps elicit something of 
interest from its consideration. 
Burmeister, whose valuable “ Manual” presents a compendious 
summary of all the observations previously made upon insects, in 
describing the structure of their compound eyes, says, “ The horny 
integument consists of many small hexagonal surfaces, which cor- 
