Stuphylbiida of ilie Amazon Vallci/. 411 



extremity and sides, each with a fine puncture on the 

 middle. Hind body reddish, shining, impunctate. 



Ega; three individuals, one of which bears a label, 

 " under bark, nimble." 



2. Isomalus diibius,i\.s]). Perdepressus, piceus, nitidus, 

 fere lasvis, antennis pedibusque testaceis ; thorace basin 

 versus fortiter angustato ; ely tris disco unipunctatis. Long. 

 Corp. 11 — 1| lin. 



Antennse rather longer than head and thorax, slender, 

 reddish, slightly thickened towards the extremity; 3rd 

 joint a little longer than 2nd; 10th joint quite as long as 

 broad, 11th a good deal longer than 10th. Head as 

 broad as the thorax, flat, impunctate, very shining, pitchy, 

 with the mandibles and parts of the mouth red. Thorax 

 as broad as the elytra ; the sides rounded at the front 

 angles, greatly narrowed behind, with an indistinct denticle 

 behind the middle, the base very narrow ; shining piceous, 

 almost without sculpture, the front margin on either side 

 bearing two approximate punctures. Elytra narrowed 

 towards the shoulders, a good deal longer than the thorax, 

 shining, pitchy, each with a puncture on the middle. 

 Hind body broad, flat, piceous, paler at the extremity, 

 imjmnctate, beai-ing a few upright setje. Legs reddish. 



Ega ; three individuals, which vary in size, in the 

 development of the head, and in the length of the 

 antennae. 



Ohs. — This species is extremely closely allied to /. pal- 

 Udipennis, Fauv., but is a little larger, has the elytra 

 concolorous, and the antennas a little longer. 



3. Isomalus tenuis, Fauv. 



St. Paulo ; a single individual. The species Avas de- 

 scribed by Fauvel from a specimen coming from Venezuela; 

 the St. Paulo exponent does not differ from an example in 

 my collection from Santa liita, Brazil, so that the species 

 a})pears to possess a wide range. 



LiSPINUS. 



This genus as at present constituted consists of about 

 forty described species, which occur pretty generally in 

 the warmer parts of the globe ; though not yet recorded 

 from Australia, I can state that species of the genus occur 

 even there. The distinction of the species from one 



