from the Galapagos Islands. 21 



Section GEODEPHAGA. 

 Family FERONiiDiE. 



Feronia Calathoides. Fer. nigra oblongo-ovata, nitida ; antennis pi- 

 ceo-rubris ; pedibus piceis ; thorace subquadrato, subplano, foveis 

 duabus oblongis postice impressis, elytris sulcato-striatis. — Long. 

 Corp. 4 j lin. ; lat. 1| lin. 



This insect very much resembles the Calathus cistelloides ; its 

 head however is rather longer, and both thorax and elytra are 

 rather shorter ; the latter, moreover, are much more deeply stri- 

 ated, and the interstices between the striae are convex. With the 

 exception of being a trifle shorter, the thorax resembles that of 

 Calathus cistelloides in being nearly quadrate and but little con- 

 vex : the sides are nearly straight and parallel behind, but slightly 

 contracted in front ; the posterior angles are right angles ; the 

 dorsal channel is distinct, and midway between the dorsal channel 

 and either side of the thorax is a narrow, impunctate, longitudinal 

 groove, in length occupying fully the basal third of the thorax. 

 The elytra are of an oblong-ovate form, and rather broader than 

 the thorax ; the somewhat deep strise with which they are marked 

 are smooth, but a few punctures are observable on the outer 

 margin of each elytron. The legs are sometimes pitchy and 

 sometimes pitchy-red. 



Feronia galapagoensis. Fer. angusta, nigro-senea, nitidiuscula ; an- 

 tennis rufescentibus, pedibus piceis ; thorace subquadrato, sub- 

 plano, postice angustiore ; foveis duabus postice impressis ; elytris 

 elongatis, lateribus subparallelis, leviter striatis. — Long. corp. 5^ 

 lin.; lat. l|lin. 



This species is equal in size to the Calathus cistelloides, but is 

 of a narrower and much more elongated form. The broadest part 

 of the thorax is rather in front of the middle, and from this point 

 they are gradually contracted before and behind ; in front in such 

 a manner as to give to the sides a slightly rounded outline, but 

 behind, the margins are nearly straight, and converge in no very 

 marked degree. The elytra are elongated, but little broader than 

 the thorax ; the shoulders are obtusely rounded, and the sides 

 form a very gentle curve, so that they might be compared to a 

 very long oval ; they have delicate simple striae : on the second stria 

 are two punctures rather remote from each other and situated on 

 the hinder half of the elytron ; and on the third stria is another 

 puncture situated on the anterior half : besides these, there are a 

 few punctures on the outer margin. The legs vary in colour from 

 pitchy-black to pitchy-red. The aeneous tinge on the body is 

 nowhere very distinct. 



These two insects will not associate well with any of the sub- 



