414 Mr. Westwood's Illustrations of the 



wishing however to investigate my exotic Gyrlnidce, I found on examining 

 the underside of the insect that it had slender legs and antenna^ ; I therefore, 

 still supposing that my insect must be one of the Hydradephagn, 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, tiioracis elytro- 

 rumque lateribus continuis. 



Caput transversum, depressum, thoraci ad oculos immersum. Oculi sat 

 magni, latérales. Labrum transversum, breve, anticè ferè rectum, angulis 

 anticis rotundatis. Mundihulœ forcipatœ, breves, subtrigonœ, intùs eden- 

 tatse, basi intùs in lobum magnum rotundatum producto. Max'dlœ parvee, 

 lobo interno incurvo, intùs setis rigidis instructo, externo palpiformi bi- 

 articulato, articulo Imo brevi, 2do ante apicem paull^ crassiori, apice 

 ipso truncato. Palpi maxillares maxilla breviores, incrassati, cylindrici, 

 4-articulati, articulo Imo brevissimo, ut vix distinguendo, 2ndo magno 

 subconico, reliquis duobus sensim tenuioribus, extimo prœcedente paullo 

 longiori, apice oblique truncato. Mentuin basi hand articulatum (lineâ 

 indistinct;! locum articuli occupanti), breve, transversum, angulis latera- 

 libus anticè in lobos duos ferè parallelos productis, dente nullo medio. 

 Lubiian ultra lobos menti baud extensum. Palpi labiales brevissimi, 

 scapo basali inserti, 3-articulati, articulis duobus basalibus brevibus, ul- 

 timo longiori compresso, et apicem versus pauUt) crassiori (minime secu- 

 riformi), apice oblique truncato. Jugulum elongatum, basi mento an- 

 gustius, apice latiori, angulis anticis seta instructis, fossulâ profunda 

 utrinque pro receptione maxillarum, alterâque inter banc et oculum pro 

 receptione antennarum. Antenme capite ferè dupl5 longiores, gracillimœ, 

 U-articulatee, articulo Imo incrassato subarcuato, 2ndo caeteris breviori, 

 reliquis lequalibus. 



