422 Experiments on the Sense- Organs of Insects. [July, 
duced on a Tipula or daddy-long-legs. A large blue-bottle fly 
(Musca Cesar) seemed to suffer no ill effects, and it was found 
flying on the window the next day, lively and apparently uncon- 
scious of its loss. 
Three Stomoxys calcitrans on losing their antennz seemed not 
at all affected, being as lively as ever, wiping their feet and run- 
ning and flying up the window, with motions identical with oth- 
ers of their species on the same window. 
On removing the antennz from a beetle (Harpalus caliginosus) 
no difference in its motions was observed; a Clytus robinie seemed, 
however, slightly discommoded, while an Ellychnia corusca, when 
mutilated, walked slowly and with difficulty, where before it 
walked with moderate rapidity touching the ground incessantly 
with its antenn ; it did not move in a direct line, but hesitat- 
ingly, and sometimes tumbling over on one side. It was evidently 
gravely affected, and finally remained quiet for several hours; 
a potato beetle (Leptinotarsa decem-lineata) acted in the same 
manner. On the other hand a weevil, Hylobius pales, on losing 
its antennæ, exhibited no signs of discomfort; it did not feign 
death at first, nor did it walk over the table with a less well 
directed gait than before. . 
A few Hemiptera, which, it should be observed, have no palpi, 
suffered the loss of their antennæ. Cicada canicularis flew about 
more lively than before it was operated upon. In Coreus tristis 
no effect was produced, while a large Arma-like bug was made 
more sluggish. 
The red-legged grasshopper ( Caloptenus femur-rubrum) was 
not affected, nor was Orchelimum agile, while a cricket (Nemobius 
vittatus) on losing its antennæ, at once stopped, not leaping more 
than two inches, and walked slowly, but used its palpi in walk- 
ing, cleaning its legs with them. On removing the labial palpi 
its movements were not different, though, if anything, livelier. 
On removing the maxillary palpi, no difference in its actions was 
produced. A common Gryllus, in losing its antennæ, was igi 
slightly affected. 
A large dragon-fly, Æschna heros, on the loss of its antenn®, 
seemed to fly freely about the room, but would butt against the 
wall, and on being taken out of doors, flew to the ground, where 
it usually flies rapidly off in the air. ; 
_ Spiders seemed to be affected by the loss of their maxillary 
_ palpi much as insects by the loss of their antenna. A female 
Lyeosa-like spider, after the removal of its palpi, for four or his 
