44 U. S. NATIONAL MUSEUM BULLETIN 216 



3a. Scambus longicorpus longicorpus Walley, new subspecies 



Figures 310,j; 311,i 



Male: Front wing 3.0 mm. long; antenna with 21 segments; head 

 very thick anteroposteriorly, as wide through temples as through 

 eyes; temple about 0.77 as broad as eye and strongly rounded to the 

 weak occipital carina; thorax slender, subcylindrical ; propodeum with 

 rather weak, dorsomedial carinae extending from base to apical 0.25 

 of propodeum; hind coxa rather slender, about 0.66 as deep as long; 

 front femur somewhat flattened beneath, but without a distinct exci- 

 sion; front tibia almost straight; abdomen slender; tergite 1 twice as 

 long as wide at apex and equal in length to tergite 2, with median 

 carinae distinct to apex; apex of central area, and lateral areas of 

 tergite 1, weakly sculptured; tergite 2 with dense, shallow, irregular 

 punctures; remaining tergites with similar but weaker and successively 

 diminishing sculpture. 



Black. Palpi, scape and pedicel beneath, and tegula, pale yellow- 

 ish; stigma blackish; front leg with coxa narrowly blackish at base, 

 remainder of coxa, and trochanter pale yellowish, femur, tibia and 

 tarsus pale reddish; middle leg with coxa mostly brownish, except at 

 apex, the apex, also trochanter and basal 0.6 of tibia, pale yellowish, 

 remainder of leg pale reddish; hind leg with coxa black varying to 

 dark brown, base of trochanter brownish, remainder of trochanter 

 and narrow base of tibia pale yellowish, femur dull reddish to brown- 

 ish with paler extremities, tibia mostly rather dark brownish with 

 the central portion somewhat paler but without a distinct pale stripe 

 or annulus, tarsus brown with the segments slightly paler at base. 



Female: Front wing 3.75 mm. long; antenna with 21 segments; 

 shape of head and thorax much as in male; temple almost as broad 

 as eye; mandible with coriaceous sculpture near base; cheek very 

 short, about 0.2 breadth of mandible at base; propodeum smooth, 

 with a few, suberased punctures mostly on sides, and with only indis- 

 tinct, dorsomedial carinae extending a little beyond middle; abdo- 

 men slender; tergite 1 rather small, with a few shallow punctures in 

 lateral areas and at apex of central area; tergite 2 with large, shallow 

 punctures which are mostly separated by intervals equal to or exceed- 

 ing the diameter of a puncture; tergites 3-5 similar to 2 but with 

 punctures somewhat shallower, especially before the apical area; 

 tergites 6 and 7 with punctures very shallow and indistinct; ovi- 

 positor very slender and rather weakly compressed, lower valve with 

 basalmost ridge very oblique, upper valve with a weak nodus; sheath 

 as long as portion of body posterior to origin of hind wing; valves 

 with fine, rather inconspicuous hairs. 



Black. Maxillary palpus yellowish, with apical segment fuscous; 

 labial palpus fuscous; antenna varying from dark brownish to black; 



