490 SEKEICORNIA. 



1. Allotriopsis nasalis. (Tab. XXL figg. 18, tf; 18 a, antenna.) 



Very elongate, somewhat flattened above, moderately shining ; fusco-castaneous ; above somewhat thickly 

 clothed with moderately coarse, decumbent, yellowish-cinereous hairs, those on the prothorax long and 

 appearing to be transversely or obliquely combed inwards, the hairs on the elytra unequally distributed, 

 here and there forming denser patches, the under surface very sparsely clothed with long hairs. Head 

 closely, coarsely punctate. Prothorax much broader than long, widest a little before the middle, broadly 

 depressed and explanate at the sides, and with a large shallow fovea on either side of the disc about the 

 middle and another towards the base ; the sides rounded from the middle forwards and converging and 

 sinuate behind ; the hind angles long, narrow, and divergent, finely carinate. Elytra rather more than 

 four times the length of the prothorax, and a little wider than it, parallel to near the middle and 

 narrowing thence to the apex, the apices dehiscent and separately rounded ; the surface impressed with 

 fine and rather coarse punctures intermixed, the punctuation towards the sides here and there becoming 

 more crowded, and with traces of very shallow longitudinal grooves, which become more distinct laterally 

 and at the apex. Beneath very sparsely punctured. 



Length 14, breadth 3| millim. ( tf .) 



Hob. Guatemala, Cerro Zunil 4000 feet (Champion). 



One example, found in a forest-clearing, in the vicinity of the coffee-plantation of 

 Las Nubes, on the Pacific slope. The insect is unknown to Dr. Candeze. 



Group HYPODESINI. 

 HYPODESIS. 



Hypodesis, Latreille, Ann. Soc. Ent. Fr. iii. p. 156 (1834) ; Lacordaire, Gen. Col. iv. p. 202 

 (1857) ; Candeze, Monogr. Elat. iv. p. 242. 



One of the most characteristic genera of Elateridae in Central America ; nine species 

 are known to me *, two only of which extend into the northern part of South America. 

 In some of them, H. aureipilis and H. auricoma, the meso- and metasternum are almost 

 connate, the transverse suture being distinct at the sides only. Most of the species 

 have a more or less distinct matted tuft or pencil of hairs on either side of each of the 

 first four ventral segments behind, these being partly visible from above, as in various 

 Buprestidae ; in H. viridipennis there is a large impunctate glabrous space in front of 

 each of these tufts. 



a. Ventral segments with, at most, a small glabrous spot on either side ; elytra 

 not metallic (except in H. auricoma and its var. a). 

 a'. Hind angles of the prothorax sharply carinate ; elytra without definite 

 markings. 

 a". Elytra conspicuously pubescent. 



a'". Prothorax without a distinct projecting tuft of hairs in the centre 

 at the base. 

 a\ Elytra finely punctate-striate. 



a\ Prothorax moderately coarsely punctate, distinctly or obsoletely 

 canaliculate. 



An additional undescribed form from Chiguinda, Ecuador, is contained in the Janson collection. 



