CHL^NOBIA. 167 



" Rhizotrogides." It has, namely, long and sessile anterior coxae, much longer than 

 the breadth of the free lateral space of the prosternum ; and equal ventral segments 

 2-5, with their sutures in the middle soldered. The general form and minor characters 

 of the species also are those of Lachiosterna and Phytalus, and not of the " Macro- 

 dactylinae." The males are distinguishable from the same sex of Phytalus only by the 

 tarsi being thickened, and densely hairy beneath. The mandibles are exserted, curving 

 over the edge of the ligular part of the mentum ; the tarsal claws are dentate at the 

 base and subequally and strongly bifid at the apex ; the spurs of the hind tibise in the 

 males are both freely articulated. 



The only species hitherto described is Brazilian. 



1. Chlgenobia aegrota. (Tab. x. fig. l.) 



Elongata, angusta ( $ postiee paullo crassiore), flavo-testacea (capite thoraceque interdum rufis), supra glabra, 

 discrete punctulata ; elytris interstitio suturali (prope basin et apicem excepto) convexo, costulis duabus 

 angustis parum convexis (interdum obsoletis), brevibus; clypeo lato et brevi, concavo, utrinque late 

 rotundato, antice medio sinuato ; thoracis angulis posticis obtusis. Antennae 9-articulatae. 



S • Pygidium magnum, convexum, toto longe erecte pilosum, discrete punctatum, margine apicali reflexo. 

 Metasternum femoraque subtus dense ilavo-pilosa. Ventris segmenta medio plana punctato-pilosa ; 

 6 m magnum, medio canaliculatum. Tarsi valde elongati, crasse filiformes, subtus dense pilosi. 

 $ . Pygidium usque prope apicem gradatim declive ibique bituberosum et subito depressum, concavum, breviter 

 sparsim pilosum. Corpus subtus sparsius et brevius pilosum, crebrius punctatum. Ventris segmentum 

 6 m convexum, integrum. Tarsi breviores et tenuiores, subtus breviter pilosi. 



Long. 13-16 millim. 



Hab. Mexico, Cordova, Tomatlan [Salle), Jalapa (Edge). 

 An example from Jalapa is figured. 



2. Chlaenobia scabripyga. 



G. cegrotce similis : differt thorace angulis posticis rectis subacutis pygidioque 3 $ grosse confluenter punctato, 



apice solum piloso. Antennae 10-articulatae. 

 J . Pygidium magnum, convexum, margine apicali minus alte reflexo. Ventris segmenta medio transverse 



convexa, rigidius setosa. 

 $ . Pygidium apice fossa magna rotunda et profunda laevi. 

 Long. 14-17 millim. 



Hab. Mexico, Juquila (Salle). 



3. Chlsenobia latipes. 



Preecedentibus similis, sed differt utroque sexu tarsis omnibus late dilatatis, plantis densissime pilosis; clypeo 



paullo ampliore et profundius concavo, antice medio sinuato ; tborace elytrisque paullo grossius et densius 



punctatis, illo angulis basalibus rectis. Antennse 10-articulata3. 

 <5 . Pygidium sat dense punctatum, mediocriter convexum, medio sulcatum, apice reflexo et piloso. Ventris 



segmenta medio plana, 2°-4 m breviter, 5° et 6° longe pilosa. Tibia? posticae calcari interiore lato, apice late- 



raliter exeiso. 

 $ . Pygidium medio tuberculis magnis obliquis duobus ; medio late sulcatum, apice subtruncatum, margine 



reflexo. 

 Long. 15 millim. 



Hab. Mexico, Teapa (Salle). 



