ART. 23 REVISION OP MACROCENTRUS MUESEBECK 11 



32. Antennae normally 44 to 50 segmented; longest segment of 



maxillaiy palpus usually shorter than second segment of 

 antennal flagellum ; nervulus usually interstitial ; stigma 

 usually brown, paler at base ; palpi and tarsi usually more or 

 less fuscous or blackish ; head varying from entirely testa- 

 ceous to entirely black, more or less of occiput and vertex 

 usually blackish ; thorax varying from entirely yellow to 



mostly black; apex of abdomen often black 31. pallisteri De Gant 



Antennae normally 50 to 55 segmented; longest segment of 

 maxillary palpus at least as long as second flagellar segment 

 of antenna, usually longer ; nervulus usually a little post- 

 furcal; stigma uniformly yellow or yellowish ferruginous; 

 palpi and tarsi pale yellow; head, thorax, and abdomen en- 

 tirely ferruginous or testaceous, without blackish markings. 



32. cerasivoranae Viereck 



33. First, second, and more or less of third abdominal tergites 



closely longitudinally aciculate or delicately ruguloso-acicu- 

 late ; longer calcarium of posterior tibia never more than half 

 as long as basitarsus, usually distinctly less ; metapleural 

 tooth rounded or truncate; second abscissa of cubitus most 

 frequently less than half as long as recurrent vein ; vertex 



either entirely yellow or with a blackish transver.se band 34 



Three basal abdominal tergites mostly smooth ; longer cal- 

 carium of posterior tibia distinctly more than half as long 

 as basitarsus ; metapleural tooth acute, very prominent ; sec- 

 ond abscissa of cubitus much more than half as long, some- 

 times fully as long, as recurrent vein ; vertex always with a 

 broad blackish transverse band extending to the eyes 35 



34. First abdominal tergite not distinctly three times as long as 



broad at apex ; second tergite only a little, or not, longer than 

 broad; third not longer than broad; nervulus postfurcal by 

 nearly, or quite, its own length ; radiellan cell widening slightly 



at apex; head, including vertex, entirely pale 33. delicatus Cresson 



First abdominal tergite very slender, more than three times as 

 long as broad at apex ; second tergite about twice as long as 

 broad ; third much longer than broad ; nervulus only slightly 

 postfurcal ; radiellan cell not widening at apex ; vertex with 

 a broad blackish transverse band extending to the eyes, or 

 nearly 34. nuperus Cresson 



35. Ovipositor sheaths as long as the body ; eyes large, very promi- 



nent, not divergent below; temples and cheeks strongly re- 

 ceding ; longest segment of maxillary palpus hardly as long 

 as first segment of antennal flagellum ; first abdominal tergite 

 narrowing from spiracles to base; radiella only weakly 

 sinuate; nervulus postfurcal by more than half its length. 



35. texanus, new species 

 Ovipositor sheaths shorter than height of apical truncature of 

 abdomen; eyes a little divergent below; temples and cheeks 

 rather full, convex ; longest segment of maxillary palpus 

 distinctly longer than first segment of antennal flagellum ; first 

 abdominal tergite not narrowing from spiracles to base, the 

 spiracles very prominent; radiella strongly sinuate, radiellan 

 cell very narrow at middle ; nervulus usually only very weakly 

 postfurcal 36. uniformis Provancher 



