6 THE CANADIAN ENTOMOLOGIST. 



ment, is black, smooth, the petiole being slightly roughened and about 

 twice as long as wide. Wings hyaline, the venation brown. 



Described from one specimen. A $ named in ms. A. brevicornis, but 

 which I now believe to be the opposite sex of the above species, agrees 

 with it in colour, but has unusually short, i6-jointed antennae that do not 

 extend beyond the apex of the metathorax, and while the flagellar joints 

 are also short, they are yet distinctly longer than wide. 



The opportunity is taken here to describe three other species in this 

 genus, which have been long in my collection, as follows : — 



(13) Aphidius pinaphidis n. sp. 



^ $ . — Length 2? to 3 mm. Brownish-yellow ; in the ^ the occiput, 

 disks of metathorax and abdomen are black or blackish ; in the $ only the 

 abdomen shows a dark blotch or shade above toward the tip, otherwise it 

 is wholly brownish-yellow. The ^ antennae are 25-jointed, the % 16- 

 jointed, and in both sexes the flagellum is black, the joints being longer 

 than wide, while the mesonotum is distinctly punctate. Wings hyaline, 

 venation as usual brown. 



Hab. — Jacksonville, Fla. 



Described from several specimens reared by me many years ago from 

 the pine aphis Lachnus Australis. 



(14) Aphidius bifasciatus n. sp. 



^ . — Length 2* mm. Brownish-yellow ; the abdomen and flagellum 

 black, the petiole yellowish. 



This species has 20-jointed antennae, a peculiar shagreened punctuation, 

 no parapsidal grooves, two transverse brown bands on the anterior wings, 

 and thickened or swollen posterior femora. 



Hab. — Jacksonville, Fla. 



Described from a single specimen reared from the pine aphis. The 

 banded front wings and the swollen posterior thighs readily distinguish 

 the species. 



(15) Aphidius nigriceps n. sp. 



^. — Length 2? to 2* mm. Bright yellow testaceous, smooth and pol- 

 ished j the head above and the disk of the mesonotum black. Sometimes 

 the disk of two or three of the abdominal segments also show dusky 

 blotches or shades. The antennae are 21 or 22-jointed, very long, black, 

 except the two basal joints ; the flagellar joints are about twice as long as 



