102 U. S. NATIONAL MUSEUM BULLETIN 216 



Heinrich 1949, described also from southern Germany, is close to 

 P. brevis, and may be the same species. The type is a female, and 

 is difficult to determine with certainty. The species from the eastern 

 Palaearctic are Ephialtes hokkaidonis Uchida 1928 (Japan), Ephialtes 

 tenchozanus Sonan 1936 (Formosa), and Ephialtes arisanus Sonan 

 1936 (Formosa). The above are hereby referred to the genus Pimpla 

 where all except manifestator and brevis make new combinations. 



Keys to the Nearctic species of Pimpla 



MALES 



1. Hairs on combined costa and subcosta decumbent, most of them about 0.3 



as long as the stigma is wide; apex of clasper a long finger-like lobe (fig. 340). 



1. decumbens, new species 



Hairs on combined costa and subcosta mostly erect, most of them about 



0.8 as long as the stigma is wide; apex of clasper various 2 



2. Apex of clasper rather broadly spatulate (fig. 343) . 4. spatulata, new species 

 Apex of clasper a short point, or elongate and fingerlike (figs, 341, 342) ... 3 



3. Apex of clasper a short point (fig. 341); many of the hairs on lower half of 



temple suberect and about as long as labial palpus; temple in profile about 



0.45 as long as eye 2. macra (Cresson) 



Apex of clasper elongate, fingerlike (fig. 342) ; hairs on lower half of temple 

 inclined, about 0.35 as long as labial palpus; temple in profile about 0.62 

 as long as eye 3. brevis (Morley) 



FEMALES 



1. Dorsal part of basal three teeth of ovipositor tip turned only a little forward 



(fig. 329, h) ; second trochanter of hind leg ivory white 2 



Dorsal part of basal three teeth of ovipositor tip turned forward almost hori- 

 zontally (fig. 330, a) ; second hind trochanter fulvous above 3 



2. Hairs on lower half of temple a little denser, shorter, and less erect; nervellus 



broken near its upper 0.35; clypeus about 2.25 as wide as long; ovipositor 

 sheath about 2.6 as long as front wing. (These female characters are all 

 variable and seldom permit a certain determination.) 



1. decumbens, new species 



Hairs on lower half of temple a little sparser, longer, and more erect; nervellus 



broken near its upper 0.45; clypeus about 2.2 as wide as long; ovipositor 



sheath about 3.0 as long as front wing. (These female characters are all 



variable and seldom permit a certain determination.). . 2. macra (Cresson) 



3. Temple rather strongly convex, in profile about 0.7 as long as eye; first tergite 



about 1.05 as long as wide; ovipositor sheath about 4.5 as long as front wing; 



face unusually wide and flat 3. brevis (Morley) 



Temple moderately convex, in profile about 0.57 as long as eye; first tergite 

 about 1.25 as long as wide; ovipositor sheath 1.8 to 3.0 as long as front wing; 

 face moderately wide and flat 4. spatulata new species 



1. Pimpla decumbens, new species 



Figure 340 



Male: Front wing 5.4 to 7.8 mm. long; hairs on lower half of temple 

 inclined, about 0.6 as long as labial palpus; hairs on combined costa 



