ICHNEUMON-FLIES, PART 2 1 EPHIALTINAE 



25 



Figures 4, 5. — Localities: 4 (left), Scambus (Endromopoda) productus; 5 (right), 

 S. (Lissoscambus) arizonensis. 



Lissoscambus Walley, new subgenus 



Type: Scambus (Lissoscambus) arizonensis, new species. 



Submetapleural carina absent; propodeum rather long, unusually 

 smooth and evenly convex, and without dorsomedial carinae; first 

 tergite with median carinae not extending beyond apex of basal 

 declivity (the latter opposite spiracle) ; tergites 2-6 unusually un- 

 even, especially in female, and with coarse, very unevenly distributed 

 punctures (crowded along subbasal impression, mostly lacking on 

 median callosities, and elsewhere sparse and usually separated by 

 intervals equal to two or three times the diameter of a puncture), 

 except on the polished apical margins; subgenital plate of female 

 with a very large, median, basal, membranous excision; ovipositor as 

 in subgenus Ateleophadnus ; male genitalia unusually small. Thorax 

 red with blackish markings; propodeum and abdomen often more or 

 less red. 



This subgenus is known only from southwestern United States and 

 Mexico. In addition to the type species described below, it contains 

 Pimpla crassicauda Cresson 1874, and two undescribed Mexican 

 species. 



1. Scambus (Lissoscambus) arizonensis Walley, new species 



Figure 311,d 



Male: Front wing 5.0 to 7.0 mm. long; antenna with 26 to 28 seg- 

 ments; cheek about 0.24 times breadth of mandible at base; temple 

 rather narrow and strongly receding; head, thorax, and propodeum 

 with only weak traces of shallow punctures; propodeum moderately 

 long, sometimes with a short, shallow, median, longitudinal sulcus at 



526527—60 3 



