Abt. 8. BKACONID AND CHALCID FLIES FEOM FORMOSA — GAHAN 6 



m front the head is obviously broader than high; eyes large and 

 prominent, nearly circular, sparsely hairy; face twice as broad as 

 high ; palpi short ; antennae broken, the first flagellar joint about two 

 and one-half times as long as thick, following joints shorter; meso- 

 scutum faintly alutaceous and subopaque, with a few obscure 

 Avrinkles following the subobsolete notauli, the anterior one-third 

 with some distinct rugosities or subobsolete punctures; propodeum 

 nearly smooth above but with its posterior face and lateral margins 

 distinctly rugulose, the petiolar area concave, much broader than long 

 and more or less transversely wrinkled within; the lateral areas of 

 posterior face of propodeum small and mostly restricted to the 

 lateral angles; pleura smooth; legs normal; stigma of forewing short 

 and broad, emitting the radius at the middle; metacarpus distinctly 

 longer than the stigma ; radius short, somewhat thickened basally, its 

 first abscissa less than twice as long as the stub of second, Avhich is a 

 little longer than the intercubitus ; brachial cell closed; abdomen 

 one and one-half times as long as the thorax, the first tergite rugose, 

 twice as broad at apex as at base; ovipositor sheaths rather broad and 

 short. General color reddish testaceous; metanotum, propodeum, 

 apical half or more of third, fourth, and fifth and all of following 

 abdominal segments dark brownish to blackish; scape and pedicel 

 testaceous, flagellum blackish ; legs concolorous with thorax, the pos- 

 terior femora and tibiae suffuGed with brownish; wings hyaline; 

 venation brownish, the costal and basal veins darker than the others, 

 and the median and submedian veins mostly pale; stigma at base and 

 narrowly along the anterior margin pale, otherwise brownish. 



Male unknown. 



Type locality. — Taihoku, Formosa. 



Type.—Q'At. No. 28984, U.S.N.M. 



Host. — Dilachnus, species. 



One female received from T. Shiraki and said to have been para- 

 sitic upon an unidentified species of Dilachnus., collected by R. 

 Takahashi. The type has lost one pair of wings and both antennae 

 are broken. 



APHIDIUS COMMODUS, new species 



This species agrees very closely with the description of pseudo- 

 platani Marshall except that the palpi are not unusually long and the 

 ovipositor sheath is not curved downward at apex. Structurally it is 

 very similar to coJemanl Viereck but may be readily distinguished 

 by its yellowish color. 



Female. — Length 2.5 mm. Smooth and shining, the first tergite 

 weakly rugulose. Head transverse, as broad as the thorax, narrowed 

 behind the eyes; eyes converging below; distance from antennal 

 fossae to apex of clypeus a little greater than the shortest distance 



