ART. 4 NEW PARASITIC HYMENOPTERA GAHAN 19 



small, about as long as broad; joints four to six longer than broad, 

 the whole funicle rather slender but gradually increasing in thickness 

 from base to apex; club nearly as long as the funicle, 3-joiated, 

 elongate-ovate, nearly twice as broad as the last funicle joint ; man- 

 dibles both distinctly tridentate; thorax as broad as long; mesoscutum 

 about twice as broad as long, shallowly but distinctly reticulate-punc- 

 tate, distinctly shining; scutellum about as long as mesoscutum, very 

 finely sculptured and opaque, axillae sculptured like scutellum; 

 propodeum very short, without definite sculpture; forewings a little 

 longer than the whole body, rather broad; submarginal vein with six 

 or seven evenly spaced long bristles dorsally; disk of wing rather 

 densely and 6venly ciliated all over except for a subtriangular specu- 

 lum behind the marginal vein; abdomen not longer than the thorax 

 and as broad as thorax, the tip of ovipositor exposed. General color 

 metallic black, the frons with strong brassy and violaceous tints 

 and the mesoscutum metallic green; antennae and legs pale yellow, 

 all coxae and femora nearly white; abdomen dorsall}^ and ventrally 

 yellowish at basal middle, with broad lateral and apical margins 

 brownish-black; wings hyaline. 



Tyjpe locality. — Ithaca, New York., in greenhouse. 



Type.— Cat. No. 29460, U.S.N.M. 



Host. — Diaspis boisduvallii Signoret. 



Five females reared from the above-named scale insect on Cattleya 

 species by Miss Grace H. Griswold, of Cornell University. Holotype 

 mounted in balsam on a slide. Four paratypes mounted on card 

 points. Male unknown. 



Family APHELINIDAE 



ENCARSIA MERITORIA, new species 



Belongs to the species group having the middle tarsi 4-jointed. 

 The species is easily distinguished from others of the group by the 

 much paler and nearly uniform color of the female. The male may 

 be distinguished by the fact that the head and thorax are mostly 

 yellow and the abdomen dark brownish. 



Female. — Length 0.6 mm. Antennae slightly shorter than the insect; 

 scape cylindrical, narrowed apically; pedicel one and one-half times as 

 long as broad; first funicle joint four-fifths as long as the pedicel and 

 about three-fourths as broad as long; second joint one and one-half 

 times the length of first; third a trifle longer than the second; fourth 

 equal to the second; two joints of the club each slightly longer than 

 the fourth funicle joint and somewhat thicker, the apical joint conical; 

 head as broad as the thorax; the face broad and apparently smooth; 

 upper part of frons and the vertex distinctl.y transversely wrinkled; 

 eyes bare ; posterior ocelli nearer to each other than to the eye-margins ; 

 thorax as broad as long, mesoscutum and scutellum ver}^ faintly if at 

 all sculptured; axillae appearing granularly sculptured; forewings 



