40 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loi 



segment fine and not very dense. A distinct tooth on posterior femora 

 and the usual tooth on anterior tibiae. Length 4.2 to 5.G mm.; width 

 2.2 to 2.6 mm. 



Type and paratypes. — Type male and 26 paratypes, U.S.N.M. No. 

 59015, collected in September and October 1918 by Harold Morrison; 

 two paratypes in the Museum of Comparative Zoology. 



Type locality. — Botanic Garden and along seashore 4 miles east of 

 Georgetown, British Guiana. 



Other localities. — British Guiana: Bartica, Demerara (E,. J. 

 Crew) ; Dutch Guiana: Rust en Werk, Surinam (on bananas; D. C. 

 Geyskes) ; French Guiana: Maroni, Cayenne (F. Pillault) ; Vene- 

 zuela: ''L. Laglaize," Tucupita, Delta Amacuro Territory (on 

 Xanthosoma sagittifoliiun; L. A. Salas) ; Brazil : Amazon River near 

 Parintins (Sept. 12 to 21, 1930; Holt, Blake, and Agostini) ; Amazon 

 River near Santarem, Santa Catharina (Bowditch collection) ; Batu- 

 rite Mountains, Ceara (W. M. Mann) ; Natal, Para (W. M. Mann). 



Remarks. — This species is closely related to the Central American 

 species M. elmhius and differs from it chiefly by being a little wider 

 and more finely punctate and in having the aedeagus not hollowed 

 out at the tip, as in M. elachius. 



MYOCHROUS NANUS, new species 



Plate 4, Figure 5 



About 4.5 mm. in length, oblong, shining bronze beneath the mot- 

 tled brown and white scales; prothorax 3-toothed, finely and some- 

 times densely punctate, elytra with the striate punctures becoming 

 much finer and more distantly placed in apical half of elytra. 



Head covered by scales to the antennal bases, punctation somewhat 

 variable, in some specimens the surface rugose, in others less densely 

 punctate, with a trace of a median line and the usual ridge on each side 

 of the occiput. Antennae reddish brown, of the usual proportions. 

 Prothorax wider than long, with three lateral teeth and a tooth at 

 apical and basal angles; disk evenly convex with a depressed line 

 marked by a row of ptinctures along the basal margin; punctation 

 rather sparse and fine, in some specimens much denser than in others. 

 Elytra with a well-marked depression below the basal callosity ; stri- 

 ate punctures in basal half moderately coarse but not dense and be- 

 coming much finer in apical half ; a tendency to transverse ridging in 

 the depression below the callosities. Body beneath shining bronze 

 with sparse pale pubescence; punctation of first abdominal joint fine 

 and not dense. Posterior femora with a tiny tooth, anterior tibiae 

 with the usual tooth. Length 4.1 to 4.7 mm. ; width 2 to 2.3 mm. 



Type and paratypes. — Type male and two paratypes, Museum of 

 Comparative Zoology type No. 28121, collected by Germain. One 

 paratype, U.S.N.M. No. 59016. 



