i8 94 .] 



THE BRITISH NATURALIST. 



257 



valligera. Among the Geometrae are Ennomos, Biston, Himera, 

 Hybernia, Phigalia, Nyssia, Amphidasis, Boarmia, Cleora, Fidonia, 

 and several other genera. Among the Tineae are Psyche, Fumea, and 

 Incurvaria, Zinckenii and masculella. In the Diptera are the genera 

 Ctenophora, Rhippidia, Culex, Anopheles, Corethra, Chironomus, and 

 Tanypus. In Hymenoptera is the genus Lophyrus. 



Branched antennae. — In the Hymenoptera the males of the genera 

 Ceraphron and Eulophus have beautifully branched antennae, some- 

 what resembling the antlers of a stag. In Coleoptera the males of 

 Ptilinus pectinicornis, Corymbites pectinicornis, Corymbites cupreus, 

 Microrrhagus pygmaeus, Polyphila fullo, Melolontha vulgaris, Ripi- 

 phorus paradoxus, and the three species of Pyrochroa, are good 

 examples of this type. 



Thickened antennae. — Among the Sphinges, the males of Smerinthus 

 and Trochilium have serrated antennae ; but in Cossus ligniperda both 

 sexes have the antennae serrated. The males of the Phycidae have 

 their antennae so thickened at the base as to have earned for them the 

 name of Knot-porus. Among the Tineae, the males of Eidophasia 

 Messingiella have much thicker antennae than the females ; but in 

 Dasycera sulphurella they are thick in both sexes. 



In Diptera the males of the Cecidomyidae and Psychodidae have 

 serrated antennae. 



In Hymenoptera the males of Eurytonia have nodose joints to the 

 antennae furnished above with long hair. 



In Coleoptera the males of Prionus and the Buprestidae have the 

 antennae much thicker than the females ; but in Sarrotrium both sexes 

 have equally thick antennae. 



Long antennae. — In Lepidoptera the males of Adela, Nematori, and 

 Nemophila have antennae more than twice the length of the antennae 

 of the females. The males of Coleophora, also, have antennae much 

 larger than the females have ; but in Phibalocera quercana both sexes 

 have long antennae. 



In Hymenoptera, one of the bees — Eucera longicornis — has the 

 antennae of the male more than double the length of those of the 

 female. In Coleoptera the males of Quedius rufipes and boops, Pro- 

 gnatha quadricornis, Bryaxis sanguinea, Laemophlceus duplicatus, 

 pusillus, and ferrugineus, Corymbites tessellatus and quercus, Limonius 

 cylindricus, Eros aurora, Ptinus fur, Dryophilus pusillus, Malthinus 

 frontalis, and the various species of Telephorus, Luperus, Cryptocephus, 

 and a few other genera. The maximum of length, though, is met 

 with in the males of the Longicornes — most notably in Astynomus 

 aedilis. In one male of this species, which I have, the antennae measure 

 no less than seven inches from tip to tip ; but I have no female which 

 measures more than three inches. In one species, Eutheia placata, 



