( &Zxexv ) 
“ Australian insect, has a distinct club. In the Aculeate 
‘“‘ Hymenoptera again the antenne are almost always of a 
‘‘simple character, and more or less acuminate, but Nomia 
“ antennata has a distinct club, as has also Steganomus, and 
‘in another genus, Thaumatosoma, a different form of club is 
‘met with. The bi-pectinate antenna of Psammotherma, one 
“of the Mutillide, is another case of a form of antenna 
‘presenting nothing special in itself, but remarkable as 
‘ standing alone among the Aculeata. 
“In the Diptera we see filiform antenne, consisting of a 
‘series of cylindrical or bead-like joints (e.g., Tipula, 
‘* Cecidomyia), and others of the disk and arista type, the 
‘intermediate forms being seen in Xylophagus, Oxycera, 
** Chloromyia, and Sargus. 
‘“‘The antenne of this latter type are generally very small 
‘“and inconspicuous. In certain Dolicopide, however, the 
‘‘arista is sometimes very long, and here, again, we meet 
‘“‘with a club where it might be least expected; I would 
‘‘particularly mention a Psilopus from Ceylon, a_ pretty 
“‘oreen fly five millimetres long, having antenne six milli- 
‘metres in length, terminating in a flat club. 
‘“The clubbed antenna appears among the Neuroptera in 
“the Myrmeleonide and Ascalaphide, being most pronounced 
‘‘in the latter. 
‘“‘In the Orthoptera a club is very rare, but is seen in 
“‘ Gomphocerus. In the Hemiptera a few species have a 
‘slight club, as in Verlusia. 
‘¢T will now just mention another point. In the antenna of 
‘‘the little water-beetle, Parnus, the antenne are very short, 
‘‘ and the second joint is much enlarged and produced forwards. 
‘« It is curious to notice a very similar development in Gyrinus, 
‘a water-beetle belonging to a totally different family. And 
‘in the great water-bug, Belostoma, the second joint is also 
‘‘ produced forwards, but in this case the third joint is simi- 
‘larly formed, and the fourth has a small hook also turned for- 
“wards. It is difficult to suggest a satisfactory reason for this.”’ 
Mr. Champion, Herr Jacoby, Mr. McLachlan, and Mr, 
Gahan took part in the discussion which ensued. 
