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tremely slight dorsal keel and with the four usual transverse-impressed lines; 

 a large blackish patch on each side, including an irregular spot of the ground 

 hue ; fore border and sides slightly rounded ; hind border elongated, rounded. 

 Prosternal spine pale-yellow, rather slender. Legs red. Hind femora as 

 long as the abdomen, longer than the hind tibia3 ; spines of the latter white, 

 with black tips. Elytra cinereous, longer than the body, with many darker 

 black-veined spots ; veins elsewhere whitish. Wings pale-ciuereous ; veins 

 black. 



Length of body, 1.83 inches ; expansion of elytra, 4 inches. 



Orizaba (Walker). 



•A. vitticeps, Walk., Cat. Dermap. Salt., Ill, 579. 



Female. — Tawny. Head smooth ; vertex with a broad, pale-yellow stripe, 

 its fore part depressed and hexagonal ; front with four well-detiiied keels, 

 which diverge toward the face, the inner pair partly black. Eyes elongate- 

 elliptical. Prothorax scabrous, with a slight dorsal keel, with transverse-im- 

 pressed lines, with an incomplete pale-yellow stripe, which is most apparent 

 near the fore border, and with some yellow marks on each side ; some slight 

 indications of black stripes ; fore border slightly rounded ; sides nearly 

 straight ; hind border slightly rounded. Prosternal spine moderately stout, 

 rather long. Hind femora a little shorter than the abdomen, longer than the 

 hind tibise, with some black marks. Hind tibias red; spines white, with 

 black tips. Elytra cinereous, almost as long as the body, with many indistinct 

 spots, which are formed by brownish veins. Wings pale-cinereous; veins 

 black, pale toward the base and toward the interior border. 



Length of the body, 1.92 inches ; expansion of elytra, 3.83 inches. 



Oajaca (Walker). 



A. scutellare, Walk., Cat. Dermap. Salt., Ill, 579. 



Female. — Testaceous, rather slender. Head smooth ; front of the vertex 

 depressed, hexagonal; front punctured, with four strongly-marked keels 

 slightly divergent. Eyes fusiform. Pronotum scabrous, with a slight dorsal 

 keel, and with the usual four impressed transverse lines ; hind part red ; front 

 and sides shghtly rounded; hind border ^niuch elongated, hardly rugulose. 

 Prosternal spine stout, slightly oblique. Hind femora a little longer than the 

 abdomen, and than tlie tibia) ; hind tibiae and hind tarsi red ; spines black at 

 30 A 



