4 14 Mr. Westwood's Illustrations of the 



wishing' liowever to investigate my exotic Gyrinidce, I found on examining 

 the imdeiside of the insect that it had slender legs and antennae ; 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. Lahrum transversum, breve, anticfe fere rectum, angulis 

 anticis rotundatis. Mandibulce forcipatse, breves, subtrigonse, intiis eden- 

 tatse, basi intiis in lobum magnum rotundatum producto. Maxillce parvse, 

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

 articulato, articulo Imo brevi, 2do ante apicem paull6 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 proecedente paull6 

 longiori, apice obliqufe truncato. Mentum basi baud articulatum (linea 

 indistincta locum articuli occupanti), breve, transversum, angulis latera- 

 libus anticfe in lobos duos ferfe parallelos productis, dente nullo medio. 

 Labium ultra lobos menti baud extensum. Palpi labiates brevissimi, 

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

 timo longiori compresso, et apicem versus paull6 crassiori (minimi secu- 

 riformi), apice obliqufe truncato. Jugulmn elongatum, basi mento an- 

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

 utrinque pro receptione maxillarum, alteraque inter banc et oculum pro 

 receptione antennarum. Antennae capite ferfe dupl6 longiores, gracillimae, 

 11-articulatae, articulo Imo incrassato subarcuato, 2ndo cseteris breviori, 

 reliquis lequalibus. 



