562 SERKICOENIA. 



One example. Belongs to Chevrolat's second division of the genus, differing from 

 the male of the only species included in it by him, S. vagans, in the deeply sulcate, 

 more attenuate, and sparsely punctured elytra, the more elongate antennae, with the 

 joints from the fourth more abruptly dilated at the apex, and the larger thorax. 



From S. sulcipennis it may be separated by the form of the antenna?, as well as by 

 the broader and more attenuate elytra. 



5. Scaptolenus amplipennis. (Tab. XXV. figg. 4, 4 a, <s .) 



<J . Scaptolenus amplipennis, Chevr. Ann. Soc. Ent. Fr. 1874, pp. 508, 515 l . 

 Hab. Mexico (Salle l ). 



Unique in the Salle collection. This insect is testaceous in colour, with the long 

 hairs on the head, thorax, and under surface fulvous, and the hairs at the sides of the 

 elytra beyond the middle fuscous. The antennae have the joints from the sixth 

 somewhat strongly dilated at the apex, the fourth and fifth also a little widened at the 

 tip. The apical two joints of the maxillary palpi are about equal in length. The 

 thorax is nearly twice as broad as long and a great deal narrower than the elytra, with 

 the hind angles extremely long and slender. The elytra are broad, a little narrowed 

 posteriorly, somewhat flattened on the disc, faintly striate, with the interstices costate 

 at the base and almost flat beyond, and somewhat thickly punctured. 



6. Scaptolenus guttiventris. (Tab. XXV. figg. 5, 5 a, s .) 



<J . Scaptolenus guttiventris, Chevr. Ann. Soc. Ent. Fr. 1874, pp. 509, 525 \ 

 Hal. Mexico (coll. Oberthicr, ex Chevrolat & Mniszech), Etla in Oaxaca (Salle 1 ). 



Described from five male examples, four of which are before me. In M. Rene 

 Oberthur's collection there is also a varietal form of the male with the elytra fusco- 

 testaceous in colour. S. guttiventris may be distinguished from all our other species, 

 S. Mrticollis excepted, by the long, dense, fuscous villosity of the head, thorax, 

 scutellar region, femora, and under surface. The antennae are distinctly serrate from 

 the fourth joint ; the eleventh joint is abruptly constricted before the apex, with the 

 apical portion narrow. The apical two joints of the maxillary palpi are subequal in 

 length. The thorax is nearly twice as broad as long, much narrower than the elytra, 

 rounded but not dilated at the sides anteriorly, with excessively long, slender, divergent 

 hind angles. The elytra are broad and convex at the base, considerably narrowed 

 posteriorly, deeply sulcate and distinctly striate (except at the base), with the interstices 

 convex and rather coarsely punctured. A specimen from Etla is figured. 



