560 SEBRICORNIA. 



a\ Elytra with coarse impressions at the apex ; pro thorax 

 sometimes marked with black ; third joint of the antennse 



considerably longer than the second signaticollis . 



b\ Elytra without coarse impressions at the apex; third 



joint of the antennas scarcely longer than the second . . teapensis. 

 d B . Elytra moderately elongate. 

 c 7 . Antennas not very elongate. 



a 8 . Prothorax and elytra usually black or piceous, the pro- 

 thorax sometimes fulvous ; elytra rather finely punctured, femoralis. 

 b 8 . Prothorax and elytra obscure rufb-testaceous ; elytra 



coarsely punctured obscuriceps. 



d 7 . Antennae very elongate, slender; prothorax and elytra 



pitchy-brown longicornis. 



1. Scaptolenus fulvus. (Tab. XXV. figg. 1,1a, 6 .) 



S . Scaptolenus fulvus, Chevr. Ann. Soc. Ent. Fr. 1874, pp. 508, 510 \ 

 c? . Scaptolenus gibbus, Chevr. loc. cit. pp. 508, 511 2 . 



Bab. Mexico (coll. Oberthiir), Pinos Altos in Chihuahua (Buchan-Hepbum), Guana- 

 juato (Salle 1 ), Etla in Oaxaca (Salle 2 ). 



In this species the elytra are broad and gibbous at the base and strongly narrowed 

 behind ; the apical joint of the maxillary palpi is about as long as the preceding ; the 

 antennae are strongly serrate from the fourth joint ; and the head, thorax, femora, and 

 under surface are thickly clothed with very long fulvous hairs, the elytra with much 

 shorter pubescence. 



Eight examples are before me, including the types in the Salle collection. S. gibbus 

 differs from S. fulvus in having the elytra a little more deeply sulcate and not quite so 

 closely punctured. Both occur at Etla. The North-American S. lecontei, Chevr. 

 (=femoralis, Lee), is extremely like S. fulvus, but it is larger and more robust and 

 has a less transverse thorax. A specimen from Etla is figured. 



2. Scaptolenus palpalis. 



J . Elongate, moderately broad, strongly narrowed behind, rather shining : head, prothorax, and scutellum 

 black, the elytra piceous, with the apical half indeterminately darker, the mandibles castaneous, black 

 at the tip, the body beneath and the femora fulvous, the antennae, tibia), and tarsi reddish-brown ; 

 the head, prothorax, scutellar region, femora, and breast somewhat thickly clothed with long fulvous 

 hairs, the rest of the elytra sparsely pubescent, the marginal hairs fulvous. Head coarsely, unequally 

 punctate, the eyes very large and prominent; mandibles short, abruptly incurved from the middle; 

 penultimate joint of the maxillary palpi stout, stouter and slightly longer than the apical joint ; antenna? 

 moderately elongate, joint 3 twice as long as 2, the following joints broadly and somewhat abruptly 

 dilated at the apex, 4 twice as long as 3, 11 abruptly constricted before the apex, with the apical portion 

 narrow. Prothorax nearly twice as broad as long, rounded but not dilated at the sides anteriorly, with 

 the hind angles divergent and moderately produced ; the surface thickly, finely punctate. Scutellum 

 densely punctured. Elytra a little more than three times the length of the head and prothorax, and 

 considerably wider than the latter, rapidly narrowing behind ; feebly sulcate, except at the base, with 



