PSYCHE 
Vol. 55 September, 1948 
No. 3 
THE GENUS PACHODYNERUS (HYMENOPTERA, 
VESPIDyE) IN THE ANTILLES 1 
By Joseph C. Bequaert 
Museum of Comparative Zoology, Cambridge, Mass. 
The key to the Antillean species of Pachodynerus and 
the appended brief notes on their synonymy and distribu- 
tion are extracted from a large manuscript covering the 
vespid fauna of these islands. They will help to clarify 
the affinities of a new Cuban species recently received 
from Hr. S. C. Bruner, who kindly presented the types to 
the Museum of Comparative Zoology. 
1. Thorax very short and high, nearly cubical, scarcely 
longer than wide. Postscutellum crossed by a 
sharp, finely crenulate ridge. Superior ridge of 
propodeum with a complete, high, translucent la- 
mella. Edge of first abdominal tergite evenly 
rounded in profile, not bluntly angular, with minute, 
scattered punctures. Ocellar area more or less 
grooved. Clypeus of male with a median pair of 
low longitudinal humps. Black, with pale brownish- 
yellow markings; abdomen dull, with appressed 
short hairs ; head and thorax with longer, somewhat 
silky pubescence P. nasidens. 
Thorax either markedly longer than wide or (in 
alayoi) superior ridge of propodeum incomplete, not 
lamellar. Black with bright yellow markings, some- 
times partly ferruginous-red. Body dull or more 
or less shiny, without appressed short hairs and 
without silky pubescence 2. 
i Published with a grant from the Museum of Comparative Zoology at 
Harvard College. 
105 
