238 Mr. J. 8. Baly’s Descriptions of uncharacterized 
nearly equal in length; in impressa they are unequal, the sixth 
joint being elongate, and, together with the seventh, compressed. 
Theopea elegantula. 
Elongata, angustata, parallela, metallico-cerulea, nitida; an- 
tennarum apice albido; thorace fovea magna transversa an- 
tice bilobaté profunde impresso ; elytris costatis, interspatiis 
bifariam punctatis. 
Mas.—Antemarum articulis 7—9 paullo incrassatis, latitudine 
perparum decrescentibus, cylindricis. 
Foem.—Antennis subfiliformibus, ad apicem obsoletius atte- 
nuatis. 
Long. 2% lin. 
Hab. Sarawak. 
The different form of the dorsal impression on the thorax, 
together with the difference in the structure of the antennee in the 
male, will separate this insect from the preceding. 
Theopea Mouhoti. 
Elongata, angustata, parallela, subtus nigro-picea, supra san- 
guinea; antennis nigris; thoracis dorso utrinque profunde 
excavato; elytris costatis, interspatiis bifariam punctatis. 
Mas.—Antennarum articulis intermediis inter se fere aqualibus, 
modice dilatatis, cylindricis. 
Long. 3 lin. 
Hab. Siam. Collected by the late M. Mouhot. 
Genus Arysa. 
Corpus elongatum, angustatum, parallelum, subopacum, non 
metallicum. Caput exsertum; antennis robustis, corporis 
Jongitudini eequalibus aut vix brevioribus, filiformibus, ad api- 
cem paullo attenuatis, articulo secundo brevi; oculis intevris, 
prominentibus, ovatis. J’horax transversus, dorso plano aut 
transversim concavo-excavato. Llytra thorace vix latiora, 
parallela, modice convexa, crebre punctata, pube brevissima 
adpressé vestita. Pedes subelongati, modice robusti, sim- 
plices; cowis anticis basi transversis, crassis, erectis, sub- 
contiguis; femoribus posticis non incrassatis, t2bus posticis 
muticis; wnguiculis appendiculatis. Prosternum angustis- 
simum. 
Type Alysa terminalis. 
The narrow parallel form will at once divide this genus from 
Galleruca and its allies. 
