170 LAMELLICOBNIA. 



Two male examples from Jalapa agree with Blanch ard's description, especially in the 

 margin of the clypeus being remarkably narrow and slightly renexed, " clypeo angus- 

 tissime refiexo ;" the outline of the clypeus is nearly semicircular. In colour they are 

 reddish or brownish-castaneous, the elytra dull, the thorax shining. The forehead is 

 convex and roughly sculptured, not plane as in L. clavatus, L. scuticeps, and allied species, 

 and the vertex has a very obtuse elevation from eye to eye, probably the " capite . . . vix 

 carinato " of Blanchard ; the outer hind angles of the posterior coxse are very much 

 produced, almost falcate. The sides of the body are fringed with remarkably long 

 outstanding tawny hairs, and the claws are all uniformly pectinated. Two females from 

 Las Vigas are darker in colour. The sexual characters are as follows : — 



c? . Pygidium, praecipue postice, valde convexum, politum, disperse punctatum, apice subtruncato-rotundaturo, 

 fortiter marginatum. Venter lateraliter pruinosus, medio politus, depressus ; segmenta 5 m -6 m subtiliter 

 canaliculata, 2 m -6 m medio breviter setosa. Antennarum clava articulis l -7 m sequalis. Ungues omnes 

 denticulati. 



2 . Pygidium elongatum, planum, apice sulcato-niarginatum, breviter truncatum, parce punctulatum. Venter 

 medio sparsim setosus; segmento 6° sat magno, piano, punctato, apice truncate Ungues dente mediano, 

 deinde usque ad apicem denticulati. 



2. Listrochelus cavatus. 



L. laportcei affinis ; sed minor clypeoque latiore supra cavato, marginibus alte reflexis. Brevius ovatus, rufo- 

 castaneus vel testaceus, supra ( d 1 $ ) nitidus, glaber, passim mediocriter punctatus, lateribus fimbriatis ; 

 tborace medio dilatato, angulis posticis valde obtusis ; elytris costulis parum elevatis. Antenna? 

 10-articulatse. 



c? . Pygidium valde convexum, gibbosum, disperse punctulatum, glabrum, apice breviter truncatum, sub-biden- 

 tatum. Pectus dense cinereo-fulvo villosum. Venter lateraliter pruinosus, medio politus, lsevis, depressus, 

 medio postice profunde canaliculars, segmento 6° brevissimo. Ungues omnes regulariter pectinati. Anten- 

 narum clava elongata, articulis 2°-7 m conjunctis sequali. 



5 . Pygidium fere planum, politum, sparsissime punctulatum, margine explanato apicali bidentatum. Pectus 

 parce hirsutum. Venter segmento 5° apice transverse exarato-sulcato ; 6° magno, convexo, grosse punctato, 

 apice fovea lata depressa et margine apicali profunde sinuato. Ungues omnes prope apicem dentati, deinde 

 usque ad basin pectinati. 



Long. 11-12 millim. 



Hab. Mexico, San Antonio de Arriba (Salle), Mexico city (Flohr). 

 A single male specimen is in the Salle collection, and we have received a pair from 

 Mr. Flohr. 



Var. L. clurangoensis. Differt colore castaneo-fusco, clypeo antice paullo angustato lateribusque subrectis nee 

 late rotundatis. (Tab. X. fig. 3, d 1 •) 



Hab. Mexico, Ciudad and Ventanas in Durango, Real del Monte in Hidalgo [Edge). 

 An example of the variety from Ventanas is figured. 



3. Listrochelus micros. (Tab. X. fig. 4, 6 .) 



L cavato affinis : multo minor, sordide testaeeo-fulvus, capite tboraceque interdum castaneo-fuscis, glaber, sub- 

 nitidus ; clypeo transverso, obtuse rotundato, margine integerrimo valde elevato, cum fronte discrete 

 punctata, fronte plana, declivi; tborace medio valde dilatato, margine confertim crenulato, supra disperse 

 punctulato ; elytris punctulato-rugulosis. Antennae 9-articulatae ; articulis 3° et 4° elongatis, aequalibus. 



