1948] Bequaert — Genus Pachodynerus 111 
streak along upper outer orbits ; a large basal spot on 
mandible; scape, except for a black streak above; broad 
humeral margin of pronotum (including carina) ; two 
spots on scutellum; most of postscutellum ; a large spot 
on upper mesepisternum ; most of dorsal areas of pro- 
podeum, the yellow continued over the sides close to the 
lateral angles ; most of tegulae ; legs except for coxae and 
part of femora, the tarsi darker, more or less ferruginous ; 
and broad apical margins on tergites 1 and 2 and on ster- 
nite 2, not abruptly widened at the sides. Wings as in 
tibialis. 
Length (h. + th. + t.l + 2), 7 mm. ; of fore wing, 6 mm. 
Female. — Except for the usual sexual differences, like 
the male in structural characters and color markings. 
Clypeus about as high as wide, the inner orbits about one 
and one-third times as far apart on the vertex as the nar- 
rowest of the clypeus ; lower free portion about as long as 
upper interocular part; surface coarsely and densely 
punctate. Clypeus yellow, with a narrow median black 
streak over apical half. 
Length (h. + th. + t.l + 2), 8 mm. ; of fore wing, 7 mm. 
The absence of a complete lamellar ridge between the 
dorsal areas and the concavity of the propodeiun is un- 
usual in Pachodynerus. It differentiates P. alayoi not 
only from all other Antillean species, but also from most 
of those found elsewhere, except P. peruensis (de Saus- 
sure). 
Cuba : Siboney near Santiago de Cuba, male holotype, 
May 5, 1940 (M.C.Z. No. 27829) ; Ciudamar near Santiago 
de Cuba, female allotype, January 18, 1948 ; both collected 
by Mr. Pastor Alayo. 
6. Pachodynerus cubensis (de Saussure, 1853). Known 
only from Cuba, where it seems to occur everywhere, 
being one of the characteristic elements of the fauna. 
la. Pachodynerus scrupeus (Zavattari, 1912), typical 
form. Found in Cuba, where it appears to be rare (Pres- 
ton and Banes, in Oriente; Santiago de las Vegas), and 
more commonly in the Bahamas (Cat I. ; New Providence ; 
Rum Cay; Eleuthera). Most of the Cuban specimens 
are colored much like P. cubensis; but the yellow markings 
