MACBODACTYLUS. 141 



3 . Spina postcoxali paullo brevior, apice obtuso ; ventre biseriatim spinoso-setoso metasternoque setis non- 



nullis similibus. 

 Var. M. nigritarsis, Beicbe, MS. Corpus densius vestitum, tibiis 4 posticis apice tarsisque totis nigris. 

 Long. 8|-10 millim. 



Hob. Mexico, Cordova, Puebla, Toxpam, Oaxaca (Salle), Cerro de Plumas (Hoge). 



Much resembles the smaller individuals of the North- American M. subspinosus, from 

 which it differs in the narrower and longer clypeus. 

 An example from Toxpam is figured. 



9. Macrodactylus ocreatus. (Tab. VIII. fig. 21.) 



Nigro-seneus, elytris fulvis ; supra pilis incumbentibus rufescenti-fulvis densissime vestitus, elytris sutura et 

 margine late subdenudatis, antennis totis, tibiis et tarsis 4 posticis tarsisque anticis (basi excepta) nigris 

 nee griseo-annulatis ; clypeo quam in M. mexicano longiore, recte angustato, apice obtuse truncato. 



c? . Prosterni spina postcoxali elongata, apice obtusa, nigra ; ventre fere nudo, nigro-aeneo, utrinque pauciter 

 (1 vel 2) nigro-setoso ; metasterno absque setis. 



<$ var. Prosterni spina postcoxali brevi ; ventre sicut pectore recumbenti-piloso, utrinque pauciter (1 vel 2) 

 fulvo-setoso ; metasterno pauciter setoso. 



Long. 10-12 millim. 



Hah. Mexico, Cerro de Plumas [Hoge). 



Distinguished from M. uniformis and its allies at first sight by the darker reddish- 

 ochreous colour, and the black tibige and tarsi, the latter unicolorous. The clypeus is 

 narrower and rather longer than in those species, and the converging sides are straight ; 

 the fore margin is truncated, with blunted angles. The pile on the thorax is longer 

 and adpressed, each hair in some examples being many-branched ; that on the elytra 

 consists of very short, slanting, separate and simple hair-scales, but sometimes of longer 

 and much denser hairs, the side margins having a broad band nearly denuded, and of 

 the reddish-tawny hue of the elytral integument, and the base a few longer erect 

 bristles. 



The variation in the length of the postcoxal spine, and in the colour of the ventral 

 bristles in the male, is noteworthy. 



10. Macrodactylus rhomboderus. (Tab. VIII. fig. 22, <j .) 



M. infuscato primo intuito similis, sed valde differt clypeo sicut in M. ocreato longiore, recte angustato, apice 

 angusto, truncato, antennis toto rufis, etc. Scbistaceo-metallicus, elytris fulvis, pube recumbente cinerea 

 usque ad margines dense vestitis; tborace ( d 1 $ ) relative lato, rhomboideo, medio minus angulatim 

 dilatato et post angulum minus sinuato et angustato ; pedibus runs, tarsis anticis nigris basi rufis, tibiis 

 4 posticis apice tarsisque nigris bis articulis basi rufis. 



c? . Prosterni spina postcoxali elongata, apice obtuso ; ventre biseriatim pauciter (utrinque 2 vel 3) fulvo-setoso ; 

 metathorace setis minoribus. 



Long. 10 millim. 



Hah. Mexico, Mazatlan {Hoge). 

 Five examples. 



