112 Bulletin of the Brooklyn Entomological Society Vol. XI 



logue no. 20399, U. S. N. M., the specimen on a tag and a slide with same 

 appendages as in silvensis. 



Decatoma marylandica n. sp. (Chalcid Hymenoptera) . From the 

 woods, June 26, 1916. Female : Length 2 mm. Entirely black, the wings 

 without a substigmal blotch (Endecatoma). The following parts golden 

 yellow: Propleurum except quadrately caudo-ventrad ; legs except prox- 

 imal half of caudal coxa; middle of caudal femora and tibiae; and the 

 middle tibiae more or less ; and the pedicel except at apex. Shallowly 

 umbilicately punctate, the propodeum ruguloso-punctate, with a narrow, 

 foveate median channel, through a peltate basin, the petiole a half longer 

 than wide, scaly; segments 2-4 of abdomen subequal, glabrous. Pedicel 

 a little longer than funicle l, funicle 2 quadrate. Stigmal vein distinct, 

 small. The yellow on the propleurum is visible above. 



An ordinary species. Glenndale, Md., one female. Type: Catalogue 

 no. 20364, U. S. N. M., the above female on a tag. One female in the 

 U. S. N. M. from Oak, D. C. 



Two New Chalcid Flies from Maryland. Elachistus marylandkus n. sp. 

 Female : The same as louisiana Girault but the lateral margin of the 

 abdomen is dusky only for two thirds its length from base (or to a third 

 cross-stripe) and there are three narrow cross-stripes at about the middle 

 and two more slightly indicated between these and base from each side. 

 Club solid, pointed at apex, the mandibles edentate, obtuse at apex. 



Two females, open woods, Aug. 12, 1916. Glenndale, Md. Types : 

 Catalogue no. 20442, U. S. N. M., the females on a card point or tag, hind 

 tibiae and a head on a slide. A third female same place a week later. 



Aprostocetus ulysses n. sp. Female : Length 0.80 mm. Dark metallic 

 purple, the wings hyaline, the antennae (except base of pedicel above and 

 club 3 which are purplish) and the legs except base of front coxae, yel- 

 lowish white, the abdomen pale golden except the margins all around 

 (except at base, more broadly at the middle at the cross-stripes), the 

 apex rather broadly and three cross-stripes (the second at middle, the 

 three in succession, the first often broadly interrupted at the middle, the 

 third often represented by a spot at meson). With the usual sculpture, 

 the line of punctures along lateral scutum minute, obscure, the propodeum 

 short at the meson, then with a weak median carina; no lateral carinas, 

 the spiracle minute, round, central. Thorax rounded, the abdomen nar- 

 rower, conic-ovate. Pedicel slightly longer than funicle i ; funicle 2 

 longest, somewhat over twice longer than wide, 3 a little shorter, sub- 

 equal to club 2; funicle i nearly twice longer than wide, longer than club 

 3 which bears a distinct terminal nipple. Mandibles bident'ate. 



Two females. Meadows by sweeping, Aug., 1916. Glenndale, Md. 

 Types : Catalogue no. 20445, U. S. N. M., the two specimens on a tag, two 

 heads on a slide. 



Gonatocerus novifasciatus Girault. Common in Maryland woods. The 

 distal half of the forewing is somewhat infuscated. The propodeum bears 



