390 Mr. Kirey’s Century of Insects. 
Palpi maxillares filiformes, quadriarticulati: articulo extimo com- 
presso, oblongo. : 
labiales triarticulati: articulo extimo magno, petiolato, se- 
curiformi. eter | TN 
Antenna serrate. 
Thorax teretiusculus, postice valde constrictus. 
Corpus convexum. 
Latreille's character of Tillus in Cuvier's Règne Animal *, “où 
la majeure partie des antennes est en forme de scie, et où les 
tarses, vus sur les deux faces, ont cinque articles trés-apparens,” 
would include the four genera I have here defined. But the other 
characters exhibited by them, both as to their habit and general 
form, and their oral instruments, are so different, that every ento- 
mologist who at all adopts that learned author's system would 
consider them as good genera. Thus in Eurypus and Tillus the 
labrum is entire, while in Arina and Priocera it is emarginate. 
Again, the labium in Tillus is entire, but in the three other genera 
bifid. In Eurypus and Axina all the palpi terminate in. a securi- 
form joint; in Tillus and Priocera, only the labial ones. In Eury- 
pus and Priocera the maxillary palpi consist of four joints ; in 
Tillus and Avina, only of three. In Eurypus, Tillus, and Aaina 
the labial palpi are biarticulate, but in Priocera they are triarti- 
culate. In Eurypus the thorax.is square; in Tillus and Aring, 
cylindrical ; and in Priocera, constricted behind. 
Evnv»rvus. 
" rubens. 20. E. 
| PraATE XXI. Fre. 5. 
- Long. corp. lin. 6, 
Habitat in Brasilia. D. Hancock. 
* iji, 254, | P | 
orpus 
