50 Treubia Vol. Ill, 1 



Euplectrus species. 



Two male specimens of an Euplectrus impossible to positively identify 

 but which apparently is very similar to Euplectrus melanocephalus GiRAULT, 

 an Australian species, were sent by Mr. Leefmans with his letter dated 

 November 27, IQIQ, under his No. 305, and are said to have been reared 

 from (young) larvae of a Noctuid moth, Ophideres fullonica LINNÉ at 

 Buitenzorg, Java. 



Tetrastichus australasiae, new species. 



Resembles (Entedon) Tetrastichus hagenowi Ratzeburg but may be distinguished 

 by the smaller size, by the less hairy praescutum, and by the first funicle joint being 

 shorter than the pedicel. 



Female. — Length 1.2 mm. Eyes hairy; antennal scape slender; pedicel nearly 

 three times as long as thick, rather slender; three distinct ring-joints; first funicle joint 

 and the ring-joints combined about equal to the length of pedicel; second funicle joint 

 slightly shorter than the first, about twice as long as broad; third funicle joint slightly 

 shorter than the second; club 3-jointed and slightly longer than the last two funicle 

 joints combined; head, pronotum, mesoscutum, axillae, and scutellum finely distinctly 

 lineolate-reticulate, propodeum mostly smooth, with a few faint wrinkles around the 

 spiracles, without a median carina; praescutum with an obscure median groove (in 

 some specimens this is apparently absent) and without hairs except for about three 

 stiff setae on each side near the parapsidal grooves; two grooves on the scutellum 

 distinct; prepectus distinctly sculptured; mesopleura practically smooth; abdomen sub- 

 petiolate, apparently without sculpture (collapsed and badly wrinkled); ovipositor barely 

 showing at tip; submarginal vein distinctly broken with three erect bristles above. 



Black; scape, pedicel, legs including all coxae, short abdominal petiole and the 

 tegulae pale yellow; antennal flagellum dark brown; mouth and a line from base of 

 each antenna to the clypeus reddish; wings hyaline. 



Type locali ty.— Padang, Sumatra. 



Type.— Cat. No. 24658 U.S. Nat. Mus. 



Host. — Periplaneta aiisfralasiae F ABRicivs. 



Seventeen females received from S. LEEFMANS with his letter dated 

 April 8, 1919, under lot No. 1, and said to be parasitic in the egg capsules 

 of the above named Blattid. Antenna of a paratype slide mounted ; other 

 material on card points. 



Family Elasmidae* 



Ëlasmus brevicornis, new species. 



Differs from other species of the genus known to the writer in the short antenna, 

 none of the funicle joints being much longer than broad. 



Female. — Length 1.6 mm. Antennal scape slender, pedicel obconical and a little 

 less than twice as long as thick; ring-joint small; first funicle joint and ring-joint 

 together subequal in length to the pedicel, the first funicle joint one-third longer than 

 broad; second and third funicle joints subquadrate ; club slightly thicker than the funicle, 

 3-jointed, the joints subequal in length, the first and second joints broader than long, 

 the apical one cone-shaped; frons and vertex with large round punctures; pronotum 

 and mesonotum weakly shagreened and covered with long recumbent hairs; scutellum 



