MACEODACTYLUS. 143 



14. Macrodactylus lineatus. (Tab. vill. fig. 25.) 



Macrodactylus lineatus, Chevr. Col. Mex. Cent. i. fasc. 4. no. 48 \ 



Hob. Mexico, Vera Cruz \ Cordova, Toxpam (Salle), Jalapa, Tapachula in Chiapas 

 (Eoge). 



In general form, narrow trapezoidal clypeus, and integumental colours, M. lineatus 

 does not differ materially from M. submarginatus and M. sericeieollis. The denuded 

 parts of the elytra are, however, in some examples not unicolorous tawny-red, but tend 

 to become black towards the sides and apex. In the paucity of the ventral setae of the 

 male it also agrees with these species ; the number of setae on each side is two, on some 

 segments only one. It differs in the elytra having a broad lateral border, the suture, 

 and three slightly raised costae on each (the 3rd, 5th, and 7th interstices) denuded ; the 

 remaining, and broader, interstices, the thorax, and the hinder part of the head are 

 clothed with moderately short adpressed yellowish-ashy hairs. The antennae are 

 wholly red ; the legs red, with all the tarsi and the apex of the posterior tibiae black. 

 An example from Cordova is figured. 



15. Macrodactylus impressus. 



M. lineato subsimilis ; pallidior, antennis (clava nigra) pedibusque rufo-testaceis, tarsis articulis basi griseo- 

 setosis, elyfcris pallide-castaneis, interstitiis 3°, 5°, et 7° pilis brevibus incumbentibus flavis vestitis, 3° et 5° 

 ante apicem coeuntibus, caeteris denudatis vel sparsissime pilosis ; capite, thorace corporeque subtus 

 aenescentibus, breviter flavo-pilosis ; clypeo trapezoideo, recte angustato, apice truncato, augulis rotundatis ; 

 thorace dorso vage multi-impresso. 

 3 . Prosterni spina postcoxali cylindrica, apice emarginato ; ventre biseriatim fulvo-setoso, setis utrinque 3 vel 4 ; 

 metasterno multi-setoso. 



Long. 10-11 millim. 



Hab. Mexico, Ciudad and Refugio in Durango (Edge), San Andres (Salle). 



Bears the MS. names of M. plumbeicollis, Chevr., and M. impressicollis, Eeiche, in 

 the Salle collection. 



16. Macrodactylus costulatus. 



M. lineato affinis ; gracilior, scbistaceus, viridi-scbistaceus vel chalybeus, parce adpresse cinereo-pilosus ; elytris 

 fulvo-rufis (interdum postice nigricantibns), utrinque bicostulatis, interstitiis 2° et 4° latioribus cinereo- 

 pilosis, 1° (suturali), 3°, 5° et totis exterioribus denudatis ; pedibus runs, tarsis 4 posticis apice tarsisque 

 nigris, bis articulis basi interdum runs (rarissime tibiis posticis toto nigris) ; antennis runs, clava 

 interdum apice infuscata ; clypeo anguste trapezoideo, apice truncato, angulis rotundatis ; thorace passim 

 punctulato, <3 angusto medio angulato-dilatato et post angulum sinuato-angustato, $ paullo, latiore et 

 obtusiore ; scutello viridi vix pubescente. 



S . Prosterni spina postcoxali valida, apice obtuso vel truncato : ventre utrinque biseriatim fulvo-setoso, setis 

 iitrinque 1-3. 



Long. 9-11 millim. 



Var. M. rufipennis. Elytra glabra, paucissime pilosa, testaceo-rufa, costis vix elevatis. 



Hob. British Honduras, R. Sarstoon (Blancaneaux) ; Guatemala, near the city 



