40 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.80 



27. MACROCENTRUS PULCHRIPENNIS, new species 



Most closely related to seTniniger, from which it differs especially 

 in the smaller, nonprominent eyes, the broader face, the broad, very 

 weakly convex clypeus, the shorter palpi, the impunctate pleura, and 

 the paler basal abdominal tergites. 



Female. — Length 4.5 mm. Head rather small, in profile lenticu- 

 lar; face very broad, twice as broad as long, temples and cheeks 

 convex; eyes not large, long oval, about one and one-half times as 

 long as wide, not prominent, not distinctly extending beyond outer 

 margins of temples ; clypeus short and broad, nearly flat, subtruncate 

 at apex; distance from clypeal foveae to eyes longer than length of 

 clypeus; mandibles long; ocell-ocular line nearly twice diameter of 

 an ocellus; maxillary palpi scarcely longer than height of head, the 

 longest segment shorter than second flagellar segment; labial palpi 

 very short, distinctly shorter than face from antennal foramina to 

 clypeus; antennae unusually slender, only slightly longer than body, 

 42-segmented. 



Propodeum more or less transversely ruguloso-striate, nearly 

 smooth at base; sides of pronotum and the mesopleura and meta- 

 pleura completely smooth and shining, impunctate; metapleural 

 tooth not distinct ; mesosternal suture deeply impressed posteriorly ; 

 legs very slender; apical teeth of posterior trochanters very weak, 

 ^hose of anterior and middle trochanters well developed; radius 

 arising from considerably beyond middle of stigma; radial cell 

 rather short, ending much before apex of wing; second abscissa 

 of radius in type shorter than the first, also much shorter than first 

 intercubitus, first cubital cell very long, not distinctly shorter than 

 first discoidal ; second abscissa of cubitus fully half as long as recur- 

 rent vein; nervulus postfurcal by less than half its length; sub- 

 median cell very weakly hairy ; the setae of basal half of wing very 

 short and indistinct; mediella more than twice as long as lower 

 abscissa of basella, the latter shorter than nervellus; radiella not 

 sinuate near middle, radiellan cell not widening at apex; upper 

 abscissa of basella interstitial with transverse abscissa of subcostella; 

 fringe of hairs on posterior margin of hind wing unusually short. 



Abdomen a little longer than head and thorax combined; first 

 tergite flattened, weakly impressed at base, polished basally, very 

 weakly aciculate on apical half; spiracles not beyond basal fourth, 

 and farther from each other than from base of tergite; rest of 

 abdomen polished, with only very faint suggestion of aciculation 

 basally on second tergite; second and third tergites fused, the sec- 

 ond suture altogether wanting; ovipositor sheaths a little longer 

 than the body. Head ferruginous; palpi and antennae blackish, 

 scape and pedicel ferruginous; thorax ferruginous, with propodeum 



