ABT. 23 REVISION OF MACROCENTEUS — MUESEBECK 49 



35. MACROCENTRUS TEXANUS, new species 



Most similar to nuperus and delicatus but distinguished as noted in 

 the key and in the discussions under those species. It is also closely 

 allied to uniformis, which it resembles in the long calcaria of the 

 posterior tibiae, the prominent acute metapleural tooth, the unusually 

 long second abscissa of cubitus, the unusually long palpi, the sinuate 

 radiella, and the mostly smooth abdomen ; but it differs especially in 

 the long ovipositor, the less strongly compressed abdomen, the shape 

 of the first abdominal tergite, which narrows rather strongly from 

 the spiracles to the base, and the narrow temples and cheeks. 



Female. — Length 8 mm. Head strongly transverse; temples and 

 cheeks receding directly behind the eyes; eyes large, very prominent; 

 malar space short; face broader than long, polished; vertex rising 

 scarcely above upper level of eyes ; postocellar and ocell-ocular lines 

 subequal, about one and one-half times the diameter of a lateral 

 ocellus; maxillary palpi very long, the longest segment nearly as 

 long as first segment of antennal flagellum, much longer than second ; 

 apical segment of labial palpus long; antennae much longer than 

 body, 56-segmented ; scape rather stout. 



Thorax short; notauli not foveolate except posteriorly; propo- 

 deum short, not convex longitudinally, very w^eakly transversely 

 sculptured, nearly smooth at base ; sides of pronotum, and the meso- 

 pleura and metapleura, smooth; mesosternal suture distinct only 

 posteriorly ; legs long, slender ; longer calcarium of hind tibia longer 

 than half the basitarsus ; stigma elongate, radius arising from a little 

 beyond its middle ; second abscissa of cubitus longer than recurrent ; 

 first cubital cell fully as long as first discoidal; third abscissa of 

 radius less than twice the second; nervulus postf ureal by at least 

 two-thirds its length; submedian cell hairless; first brachial cell 

 with only scattered hairs; radiella somewhat sinuate, the radiellan 

 cell broadest at apex, narrowest at middle; mediella hardly twice 

 the lower abscissa of basella, the latter a little longer than nervellus. 



Abdomen slender, longer than head and thorax combined; first 

 tergite nearly three times as long as broad at apex, not at all im- 

 pressed at base in front of spiracles, mostly smooth, with only a 

 little indefinite sculpture near middle, the spiracles near end of basal 

 third, and much farther from base of tergite than from each other; 

 second and third tergites subequal, the second not distinctly longer 

 than third, both slightly longer than wide, both with a little faint 

 aciculation at base; ovipositor sheaths fully as long as the body. 



Testaceous; vertex with a transverse blackish band extending very 

 nearly to the eyes ; mesonotal lobes blackish medially ; wings hyaline. 



