478 Mr. T. D. A. Cockerell — Descriptions and 



venation and middle spur separate it from M. ccerulescens, 



Lep. 



Mesonychium decoratum (Smith). 



Bocas del Toro, Panama, July 6, 1908 {W. Robinson), 

 Tliis agrees witli one from F. Smith's collection, obtained 

 by Bates in S. Paulo, Brazil. A form with broader pygidial 

 plate ( ? ) comes from Rio Mato, Venezuela, October 

 {Carriker). 



Mesonychium azureum guatemalense (Cockerell). 



Cacao, Trece Aguas, Guatemala, April 4 (^Barber ^ 

 Schwarz) . 



This specimen shows that the type was partly denuded. 

 The disc of mesothorax and outer face of hind tibiae are 

 ornamented with green scale-like hairs. 



Mesonychium duckei (Friese). 



Cabima, Panama, May 17, 1911 {Auq. Busck). 



The third s.m. is very much broader below than in 

 M. decoratum, so that the venation approaches Cyphomelissa. 

 After reviewing the subject, I must agree Vitli Ducke that 

 Mesonychium is the proper name for this genus, including 

 Mesuplia and Melissa^ and also Cyphomelissa as now inter- 

 preted by Schrottky. 



CuUetes cyaneseens, Haliday. 



I have this from Santiago, Chile, and specimens marked 

 Southern Chile (M. /. Rivera) are in the U.S. National 

 Museum. C. atripilis, Vachal, is a synonym. 



Triepeolus pruinosus, sp. n. 



? (typs). — Length about 9 mm. 



Black, the thorax densely punctured and not shining j 

 basal half of mandibles red ; labrum dark reddish ; clypeus 

 very minutely and densely punctured ; scape red at base 

 and more or Jess at apex ; second and third autennal joints 

 bright ferruginous ; a conspicuous patch of creamy-white 

 hair on each side of antennae ; mesothorax with a thin 

 pruinose pubescence, anterior margin with two nearly round 

 spots of yellow pubescence ; yellowish-white prothoracic 

 hair-band broadly interrupted in middle, ending laterally in 

 round spot on base of tubercles ; tubercles reddish ; hind 

 margin of mesothorax with a creamy hair-band ; scutellum 



