Mr. J. S. Baly on new Genera and Species of Gallcrucidre. 253 



middle of the disk, and on the sides; on the hinder disk are 

 several shallow, ill-defined, longitudinal sulcations. 



Genus Mimastra. 



Corpus elongatum, modice convexum, dorso subdepressum. Caput 

 exsertum ; facie subperpendiculare ; antennis corpore brevioribus, 

 gracilibus, filiformibus, articulo primo elongate- curvato, a basi ad 

 apicem incrassato, secundo ad tertiam partem primi sequali, tertio 

 secundo duplo longiore, quam articulum quartum paullo breviore, 

 cseteris singulatim quarto fere aequalibus ; pal pis maxillaribus lan- 

 ceolato-ovatis, apice acuminatis. Thorax transversus, lateribus an- 

 guste marginatis, obsolete angulatis ; disco irregulariter excavato. 

 Elytra thorace latiora, postice paullo dilatata, lateribus anguste ex- 

 planato-marginata, modice convexa, dorso deplanata, confuse punc- 

 tata. Pedes graciles, sat elongati ; coxis anticis erectis, contiguis ; 

 femoribus posticis non incrassatis ; tibiis omnibus apice muticis ; tar- 

 sorum posticorum articulo basali duobus sequentibus conjunctim 

 sequali; unguiculis bifidis. Prosternum obsoletum. 



Type, Mimastra arcuata. 



The less exserted and smaller head, the shorter third joint of 

 the antennas, the flattened upper surface, together with the 

 obsolete prosternum, separate the genus before us from Mom&a. 



Mimastra arcuata. 



M. elongata, subnitida, dorso subdepressa, subtus obscure olivacea ; 

 capite thoraceque fusco-fulvis,illo vertice, hoc disci maculis quinque 

 metallico-olivaceis ; antennis pedibusque piceis, femoribus infra 

 tibiisque apice fulvis ; scutello nitido, nigro ; elytris subelongatis, 

 postice leviter ampliatis, granulosis, obsolete rugulosis, tenuiter 

 punctatis, metallico-olivaceis, singulatim limbo laterali fasciaque 

 arcuata prope medium posita, ad marginem adfixa, fulvis. 

 Long. 4 1 lin. 

 Hob. India. 



Thorax one-half broader than long; sides distinctly margined, 

 nearly straight and parallel, moderately dilated, obtusely angled 

 just before their middle; upper surface covered with about six 

 large excavations; the green patches are arranged two in the 

 middle of the disk, and three in front of the basal margin, the 

 two lateral larger than the others. 



Genus Sastra. 



Corpus elongatum, convexum, supra pube brevissima adpressa 

 plus minusve dense vestitum. Caput exsertum ; facie perpendi- 

 eulari, brevi, transversa; mandibulis mediocribus ; antennis corporis 

 longitudini fere oequalibus, gracilibus aut sat gracilibus, filiformibus ; 

 articulo primo curvato, a basi ad apicem incrassato, secundo brevi, 

 tertio duobus praecedentibus longitudine rcquali aut paullo longiore, 

 quarto et sequentibus singulatim tertio brevioribus, inter se fere 

 sequalibus ; oculis magnis, prominentibus, integris ; palpis maxillari- 



