330 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.88 



SPILOCHALCIS DEMA, new species 



Figures 9, fc; 13, i; 14, i 

 Spilochalcis sp. Montgomeby, Can. Ent., vol. 65, p. 187, 1933. 



This species is most closely related to S. flavopiGta (Cresson) , but the 

 female differs in that the malar space is nearly as wide as the height of 

 the compound eye, not one-half as wide, the thorax is wider and more 

 compact with two round, impunctate elevations on the mesoprae- 

 scutum, and the longitudinal dorsal length of the epipygium of the 

 female is twice as great as the length of the eighth tergite (fig. 

 13, i) . The males of the two species differ most conspicuously in that 

 the niale of f^avopicta has the antennal scape extremely large (fig. 9, T) , 

 while it is quite narrow in this species (fig. 9, ^). 



Description. — Male : 3-5.5 mm. Antennae inserted at level of ventral 

 margins of compound eyes, apex of scape slightly exceeding level of 

 ventral margin of anterior ocellus, pedicel four-fifths and ring segment 

 one-fifth length of segment 4, 5 equal to pedicel, segments 5 to 9 equal 

 in length, 10 very slightly shorter, 11 one-sixth shorter than 9, 12 

 and 13 equal and shorter than 11, scrobe cavity shallow, edge indis- 

 tinctly carinate at ventral margin; interantennal projection wide, 

 without an apical lamina; frons shagreened over entire surface, 

 sparsely covered by rather long setae; width of malar space three- 

 fourths height of compound eye ; combined widths of compound eyes 

 two-thirds width of interocular space at level of apex of interantennal 

 projection ; left mandible with two equal, acute teeth, right mandible 

 with three, the dorsal one slightly larger ; diameter of posterior ocellus 

 two-fifths width of interocellar space. 



Dorsum of thorax minutely shagreened, provided with large pits 

 except on two rounded anterolateral areas of mesopraescutum ; pos- 

 terolateral angles of pronotum produced in small, rounded projec- 

 tions; prepectus narrow, fingerlike, slightly overlapping anterior 

 apex of tegula; apex of mesoscutellum provided with a very narrow, 

 mesally depressed lamina ; metepisternum deeply, scatteringly pitted, 

 areas between pits minutely shagreened, pubescence short ; metacoxae 

 minutely shagreened over entire surface, punctured and setose except 

 on outer dorsal surface; metafemora globose, outer surface minutely 

 shagreened, thinly covered by short setae, outer ventral margin with 

 18 to 23 small, closely set teeth, basal one slightly larger; inner 

 tooth large, blunt. 



Dorsal surface of propodeum strongly carinate except on two baso- 

 lateral areas, the latter covered by small confused reticulations, a 

 small apical projection present on each side of point of insertion of 

 petiole, spiracular slits slightly curved laterad; petiole short, only 

 slightly longer than wide; minutely shagreened and with distinct 

 lateral carinae, basal lamina narrow; gaster usually equal in length 



