TWO GENERA OF CHAiLCID-FLIES — GAHAX 361 



12. ARACHNOPHAGA FERRUGINEA, new species 



This species differs from picea chiefly in color, in the scape extending 

 to or a little above the anterior ocellus, and in the longer hypopygium'. 



Female. — Length 3.5 mm. Antennal pedicel and flagellnm dark 

 brovrn ♦ palpi black ; mandibular teeth dark brown ; abdomen beyond 

 first segment black ; head, thorax, legs, and base of abdomen nearly uni- 

 formly ferruginous, the propodeum and posterior coxae dark brown ; 

 tegula concolorous wdth thorax, its apex dark brownish; forewing 

 hyaline basally to near apex of submarginal vein ; strongly infuscated 

 from that point to stigmal vein and across the Avhole width of wing, 

 subfuscous from stigmal knob to apex; hind wing entirely hyaline; 

 ovipositor reddish testaceous, sometim'es more or less fuscous at base 

 and apex. 



Frons above the shallow scrobal depression smooth and polished; 

 rest of head finely sculptured, the sculpture strongest on sides of face 

 and on cheeks; malar space longer than half the height of eye and 

 without bristles; antennal scape reaching to or a little beyond an- 

 terior ocellus; pedicel about twice as long as broad; ring joint sub- 

 quadrate; first funicular segment very slightly longer than pedicel, 

 about twice as long as broad ; seventh segment of f unicle subquadrate ; 

 club as long as three preceding joints combined, not broader than last 

 funicular segment, and obliquely truncate. Prescutum finely and 

 densely punctate, extending distinctly beyond middle of mesoscutum; 

 scapula anteriorly sculptured like prescutum, posteriorly smooth and 

 compressed into a sharp ridge ; concave posterior portion of mesoscu- 

 tum perfectly smooth and polished and very nearly bare of pubes- 

 cence; scuteJlum sculptured like prescutum, with a few stiff hairs scat- 

 tered over its surface; axillae dorsally sculptured like scutellum and 

 with a very few inconspicuous, short, silvery hairs; propodeum 

 smooth, polished, and bare except for a very few fine hairs at the 

 extreme posterior lateral angles; metanotum medially with the flange- 

 like elevation behind apex of scutellum rounded dorsally. 



Forewing with costal cell bare except for a more or less double row 

 of long straight hairs on ventral surface near point where sub- 

 marginal vein begins to curve toward anterior margin of wing; base 

 of wing behind submarginal vein entirely bare proximad of beginning 

 of curve in subm'arginal vein ; distad of that point densely ciliated, the 

 cilia on fuscous portion of wing scalelike, elsewhere normal. Anterior 

 femur distinctly thickened, obliquely truncate apically beneath, and 

 without conspicuous bristles on the oblique apical margin; middle 

 tibia w^ith four shoit, stiff spines on its apical margin; posterior femur 

 very slightly thickened, narrower beyond than before its middle, and 

 without a carinate ventral margin; posterior tibia compressed, broad- 



