22 PEOCEEDIISrGS OF THE NATIONAL MUSEUM vol. 80 



12. MACROCENTRUS CROCIDOPHORAE, new species 



Closely resembles amicrofloides but may be distinguished partic- 

 ularly by its unicolorous stigma, interstitial nervulus, and shorter 

 mandibles. In the unusually short mandibles it resembles gifuensis, 

 but differs from that species in having the head yellow and the 

 nervulus interstitial. 



Male. — Length 4 mm. Eyes large, prominent; face but little 

 broader than long, smooth; temples not broad, recedin^g; clypeus 

 strongly convex; distance from clypeal foveae to eyes shorter than 

 length of clypeus; ocell-ocular line less than twice the diameter of 

 an ocellus ; maxillary palpus long, the longest segment as long as the 

 second flagellar segment; the two apical segments of labial palpus 

 long; antennae very long and slender, 43 -segmented ; scape large, 

 somewhat swollen. 



Thorax slender, narrowing strongly anteriorly; prothorax nar- 

 row ; middle lobe of mesoscutum prominent ; notauli coarsely f oveo- 

 late; scutellar furrow pitlike, considerably longer than half the 

 scutellum; scutellum less than half as long as propodeum, which is 

 rather long and narrow, transversely rugulose, the rugae promi- 

 nent; metapleura rugose posteriorly; legs slender; longer cal- 

 carium of posterior tibia much less than half the basitarsus; basi- 

 tarsus of anterior legs not more than half the tibia; radius arising 

 from middle of stigma; radial cell going very nearly to apex of 

 wing; first discoidal cell very long; submedian cell closely hairy; 

 nervulus interstitial; mediella not distinctly twice as long as the 

 lower abscissa of basella, the latter one and one-half times the 

 nervellus, which is but very slightly longer than nervulus; radiella 

 straight; radiellan cell a little the widest apically. 



Abdomen very slender, longer than head and thorax; first tergite 

 more than twice as long as wide, deeply impressed at base, irregu- 

 larly longitudinally aciculated; spiracles of first tergite at end of 

 basal fourth; second tergite longer than broad, parallel-sided, com- 

 pletely closely aciculate, the lateral depressed margins very narrow ; 

 third tergite also mostly aciculate; rest of dorsum of abdomen 

 smooth. 



Testaceous; vertex and occiput brownish; palpi pale; antennae 

 brownish black, scape and pedicel yellow; fourth and following 

 abdominal segments piceous; wings hyaline; stigma brown, without 

 a pale spot at base ; veins pale brown ; legs entirely yellow. 



Type.—V.S.^M. No. 43492. 



Type locality. — Baton Rouge, La. 



Host. — Crocidophora pustuliferalis Lederer. 



Remarks. — Described from three male specimens reared Septem- 

 ber 5, 1928, by H. Spencer. 



