1806.] ' 221 



t Hemelytra iutus ad apicem limbo mem- 

 branaceo nullo vel perexiguo aucta, sutura 

 recta seso invicem tangeutia ; cum alis sa^pis- 

 sime abbreviata Subg. Atiiysanus, Burm. 



ft Hemelytra intus ad apicem limbo mem- 

 branaceo aucta, sese invicem complicantia ; 

 cum alis completa, abdomine lougiora....Subg. Iassus, Fab. 



Subg. I. — Deltocephaltjs, Burm. 



The above sections are of a very flimsy and unsatisfactory cha- 

 racter, and should be either multiplied or altogether suppressed. 

 Species occur which combine the characters of two of them at once, 

 and others appear hardly to suit any of the three. Ex. gr. ; lassus 

 attenuatus, Germ., exhibits the vertex of DelfocepJialus ; the absence of 

 a membranaceous appendage to the hemelytra refers it to Athysanus, 

 and the lanceolate form and cellular structure of those organs are 

 irreconcileable with any established section. This method of division, 

 however, has been tolerated by others, and is, perhaps, sufficient for 

 the limited purposes of the present writer. Valeat quantum. The 

 DeltocepTiaU are among the smallest of the group lassus, and are 

 generally found associated in large numbers, leaping actively, assisted 

 by their wings, amongst grasses and low plants. Their markings and 

 colours are very unstable, and render description difficult. I had well 

 nigh abandoned as hopeless any attempb at a specific synopsis, but 

 perhaps the following may be of some slight use, when applied to well- 

 marked individuals. 



1. Hemelytrorum cellulae plus minus fusco-marginatae, ocellatae. 



a. Cellula; fere omnes ocellatje. 



* Vertex et pronotum transverse et 



late nigro quadrivittata quadrivittatus, n. sp. 



** Vertex et pronotum baud nigro vittata. 



§ Hemelytra truncata, apice lato . . . ocellaris, Fall. 

 §§ Hemelytra apice subattenuata, 



rotundata Argus, n. sp. 



aa. Cellulae tantum apicales (membranae) 



ocellatae socialis, Flor. 



aaa. Cellulae tantum iuteriores ocellatae, 



costa late immaculata striatus, Lin. 



2. Hemelytra puncto unico interiore ante mem- 



branam nigro puiictum, Flor. 



