410 Sir S. S. Saunders on the habits and economy 
projected outwards in the form of a crescent. Not unfre- 
quently, after fixing the mandibles, a kind of somersault is 
performed, whereby the Raphiglossa remains in a hori- 
zontal position with the back below and the legs upper- 
most, as a favourite posture for repose. One that I sent 
alive to Professor Westwood to exhibit its performances, 
took up this position of repose for the night ; and another, 
which I had subjected to the action of cyanide of potas- 
sium in this posture, quietly and unconsciously swooned 
away, still holding on in its asphixy and remaining in situ 
after death. 
Fam. CRABRONID^. 
Genus NiTELiorsis. 
Genus Pisonem cum Niteld nectens; huic habitu, illi 
tamen alaiTim constructione appropinquans. 
Corpus parvum, nitidum. 
Caput subrotundum. Oculi ovales, integri. A^itenna 
filiformes, thorace breviores, articulis brevibus, basali cras- 
siore, secundo tertio et reliquis fere teque longis. Maiidi- 
bulcB curvatte, basi robustte, pi'ope medium excavatfe, apice 
acutas, edentula?. Palpi maxillares elongati, 6-articulati, 
articulo basali tenui, secundo robustiore, quarto longiore ; 
tertio quinto sextoque bre\doribus. Labium subcordatum, 
palpis labialibus brevibus, tenuibus, 4-articulatis, articulo 
basali elongato, 2*^° et 3''° obconicis, extimo apice acuto. 
Thorax elongatulus, antice constrictus, in medio latitu- 
dine capitis, elevatus, rugosus, postice anguste productus, 
truncatus. Pedes omnes tenues. Tibia lajves. Tarsi 
unguibus pulvilloque par\as. Alee anticte celhdis ti'ibus 
submarginalibus et perfectis; quanini prima subquadrata; 
secunda minima, petiolata, venas duas recurrcntes accipiens, 
primam basi propinquam, secundam ultra mediimi ; cellula 
tertia angixsta transversa, lateribus fere parallelis, superne 
ad primam submarginalem inclinans. 
Abdomen ovato-conicum, la?ve, nitidum, thorace brevius, 
angustius, bi-evissime pediculatura. 
Species 1. Niteliopsis Pisonoides. 
Nigra, nitida; mandibulis apice castaneis; clypeo in 
utroque sexu pilis albidis sericeis circumcincto ; prothoracis 
