HYMENOPTEROUS PARASITES. 273 



forward at the sides and also medially, so that it is bisinuate, on each 

 side of the middle basally with about five fine longitudinal stride that 

 extend nearly half way to apex; third and fourth segments evenly 

 narrowed to the base of the stylate fifth; third twice as wide as long; 

 fourth triangular, as long as broad; fifth of even width throughout, 

 ten or twelve times as long as broad; apical segments membranous, 

 very slender, usually retracted but in one specimen exserted to a 

 length equally the entire length of the body; filaments of ovipositor 

 not much extruded. Fore wings without marginal cilia; hind wing 

 with two frenulum hooks. 



Type and numerous paratypes obtained by Mr. W. F. Fiske on 

 stumps of freshly cut trees in the environs of Boston, Mass., on May 

 19, 1911. 



This species is very much larger than the preceding South American 

 G. spahdatvs described on a previous page, the fifth abdominal seg- 

 ment is much longer and more slender and the sculpture of the second 

 segment is quite different. The length of the fifth segment gives it 

 quite a different appearance, but as most of the important structural 

 characters are similar in the two forms, I believe that they should be 

 considered to be congeneric. 



This species was found associated with Dolichotrypes by Mr. Fiske, 

 but does not seem to have been represented in the material examined 

 by Crawford and Bradley when they described the latter ('11). 



Synopeas meridionalis sp. nov. 



9. Length 0.7-0.8 mm.; occasional specimens from 0.6-0.9 mm. 

 Black; with the basal half of scape, trochanters base of femora and 

 tibiae deep yellow; front and middle tarsi whitish, posterior ones in- 

 fuscated; thickened apical parts of femora and tibise piceous; coxae 

 piceous, the hind ones somewhat lighter; wings hyaline. Head, seen 

 from above, broadly oval, twice as broad as thick; shagreened above, 

 less distinctly so and more shining on the front; lateral ocelli twice as 

 far from the median one as from the eye margin; malar space as long 

 as half the width of the eye; cheeks and back of head distinctly 

 shagreened. Antennae 10-jointed; scape nearly half as long as the 

 remaining joints together, strongly thickened apically; pedicel as 

 long as the width of the scape, nearly twice as long as thick; basal 

 four joints of flagellum slender, the first and fourth but little longer 

 than thick, second and third longer, but less than twice as long as 

 thick; four club-joints broad, each about as long as thick, oblique. 



