Relationships existing amongst Natural Objects. 415 
Thorax transversus, antic? angustior, posticè elytrorum baseos latitudine, sinu 
lato antico pro receptione capitis, margine postico ferè rect? truncato 
angulis anticis acutis, posticis subrotundatis; marginibus lateralibus 
rotundatis, tenuissimè marginatis: prosternum inter pedes anticos acutè 
protensum : metasternum breve. Scutellum parvum, subtriangulare. Ely- 
tra oblongo-subquadrata, depressa, posticè paulló angustiora, basi tho- 
racis partis postice latitudine, et ad eum arcté applicatä, tenuissimè 
marginata, apicibus oblique subtruncatis, abdominis apicem haud tegen- 
tibus. Pedes breves, femoribus magnis, ovatis, compressis, subtùs (pro 
receptione tibiarum) carinatis, tibiis gracilibus, anticis intüs apicem 
versus emarginatis, tarsis subsetaceis, articulis simplicibus, anticis sub- 
tis (in uno sexu saltem) serie duplici pulvillorum minutissimorum ; un- 
guibus duobus. 
Spec. 1. SPHALLOMORPHA DECIPIENS. 
Nigra, levis, subnitida ; ore, antennis pedibusque luteo-piceis, thoracis elytro- 
rumque limbo tenui-luteo. 
Long. corp. 4 lin. 
Habitat in Novà Hollandià. 
In Mus. nostr. 
Hoc genus a Pseudomorphá differt habitu latiori et magis depresso, et præ- 
sertim structurà juguli, menti et palporum labialium, atque ab Adelotopo 
antennis filiformibus, mento et palpis. 
I am further enabled by the kindness of the Rev. F. W. Hope to add to the 
interest of this communication by the introduction of a figure and description 
of another New Holland insect, which in some respects appears to be interme- 
diate between Pseudomorpha and Sphallomorpha, and of which the following 
are the characters. 
SILPHOMORPHA. 
Corpus oblongo-ovatum, subdepressum ; thoracis elytrorumque lateribus sub- 
continuis, subreflexo-marginatis. 
Caput, antenne, mandibule, maille, et palpi mazxillares fere ut in Sphallo- 
morpha. Labrum latum, breve, margine antico in medio parüm emar- 
VOL. XVIII, 3I 
