414 Mr. Wesrwoop's Illustrations of the 
wishing however to investigate my exotic Gyrinidæ, I found on examining 
the underside of the insect that it had slender legs and antennæ; I therefore, 
still supposing that my insect must be one of the Hydradephaga, immediately 
regarded it as a species of Colymbetes; but a little further examination showed 
me that the legs were neither ciliated nor fitted for swimming. I therefore 
determined to investigate the structure of the mouth, when I discovered that 
I had obtained another Carabideous insect, also very closely allied to Pseudo- 
morpha, which had not only deceived myself, but several excellent entomolo- 
gists. The following are its characters. 
SPHALLOMORPHA. 
Corpus breve, latum, depressum, oblongo-subquadratum, thoracis elytro- 
rumque lateribus continuis. 
Caput transversum, depressum, thoraci ad oculos immersum. Oculi sat 
magni, laterales. Labrum transversum, breve, anticè ferè rectum, angulis 
anticis rotundatis. Mandibulæ forcipatæ, breves, subtrigonæ, intüs eden- 
tatæ, basi intùs in lobum magnum rotundatum producto. Maxillæ parvae, 
lobo interno incurvo, intüs setis rigidis instructo, ext 
erno palpiformi bi- 
articulato, articulo 1mo brevi, 
2do ante apicem paulld crassiori, apice 
ipso truncato. Palpi maxillares maxillà breviores, incrassati, cylindrici, 
4-articulati, articulo Imo brevissimo, ut vix distinguendo, 2ndo magno 
subconico, reliquis duobus sensim tenuioribus, extimo praecedente paulld 
longiori, apice obliqué truncato. Mentum basi haud articulatum (linea 
indistinctà locum articuli occupan 
libus anticè in lobos duos fere pa 
Labium ultra lobos 
ti), breve, transversum, angulis latera- 
rallelos productis, dente nullo medio. 
menti haud extensum. Palpi labiales brevissimi, 
scapo basali inserti, 3-articulati, articulis duobus basalibus 
; brevibus, ul- 
timo longiori compresso, et a 
SDN picem versus paulld crassiori (minimé secu- 
riformi), apice oblique truncato. Jugulum elongatum, basi mento an- 
gustius, apice latiori, angulis anticis seta instructis, fossulà profunda 
utrinque pro receptione maxillarum, alterâque inter hanc et oculum pro 
receptione antennarum. Antenne capite ferè dupld longiores, gracillimæ, 
l l-articulatæ, articulo Imo incrassat 
me o subarcuato, 2ndo cæteris breviori, 
reliquis æqualibus. 
