140 LAMELLICOKNIA. 



bristles, not notably different in strength and number from those of M. uniformis and 

 M. mexicanus 6 . 



Some examples occur intermediate, in one or other feature, between this species, its 

 variety, and M. mexicanus. 



5. Macrodactylus nigripes. 



M. subspinoso quoad formam simillinms ; antennarum basi rufa exeepta, totus niger, (in immaturo elytris basi 

 fulvis), tarsis 4 posticis plus minusve cinereo-annulatis ; pube sat tenui recumbente cinereo vestitus ; elytris 

 sutura et marginibus dermdatis nigris ; clypeo parum elongato, versus apieem leviter rotundato-angustato. 



c? . Prosternum spina posteoxali elongata, gracili, apice obtuse rotundato ; metasterno medio longe setoso ; 

 ventre biseriatim fulvo-multispinoso. 



Var. vel aberratio $ . Tborace medio pilis densissimis suberectis vestito. 



Long. 9-12 millim. 



Hab. Mexico, Puebla, San Antonio de Arriba, Oaxaca {Salle), Jalapa, Amecameca 

 (Edge). 



6. Macrodactylus sHaonus. (Tab. VIIT. fig. 18.) 



M. mexieano affinis, sed differt pubescentia cserulescenti-grisea, clypeo magis angustato, pedibus runs, tarsis 

 auticis totis, 4 posticis articulis apice nigris basi griseo-setosis ; antennis runs, clava nigra ; integumento 

 dilute cseruleo, in immaturo elytris basi fulvis. 



S . Prosterni spina posteoxali apice late truncata ; metasterno et ventre sicut in M. mexieano fulvo-spinosis. 



Long. 10-12 millim. 



Hab. Mexico, Silao, Duraznal (Salle), San Juan del Rio (Edge). 



Seven examples, the single one from Duraznal being less typical than the others 

 from Silao and San Juan del Rio. 



A specimen from San Juan del Rio is figured. 



7. Macrodactylus lineatocollis. (Tab. VIII. fig. 19.) 



M. infuscato similis et affinis, sed differt elytrorum basi prope suturam tboraceque antice erecte nigro-setosis ; 

 thorace vittis nudis duabus. Minor, pilis parum incrassatis, recumbentibus, sulphureo-cinereis vestitus ; 

 integumento thoracis et scutelli nigro-seneo elytrorumque fulvo; clypeo grossissime punctato-scabroso ; 

 tibiis apice tarsisque omnibus nigris, tarsis 4 posterioribus articulis cinereo-annulatis ; antennis rufis, clava 

 nigra. 

 $ . Abdomen subtus medio a basi fere usque ad apieem dense fasciculatim flavo-setosum. 



Long. 10 millim. $ . 



Hab. Mexico, Orizaba (Salle). 

 Two examples, both females. 



8. Macrodactylus fulvescens. (Tab. VIII. fig. 20.) 



? Melolontha angustata, Latr. in Humb. & Bonpl. Obs. Zool. ii. p. 109, t. 39. f. 7 (nom. prseocc). 



Prfficedentibus minor et gracilior, fulvus, capite, tborace scutelloque cbalybeis vel ameis, pilis sat brevibus, 

 tenuibus et sparsis, fulvo-cinereis, vestitus; antennis pedibusque rufis; tarsis articulis apice, vel fere toto, 

 nigris nee cinereo-annulatis ; clypeo sat elongato et angustato, scabroso-punctato. 



