204 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



times as far from eyes as each other; subgenital plate with a high short 

 median ridge its whole visible length; apex of plate triangular with 

 scattered long, partly upright, backwardly directed black hairs; the 

 high ridge as high as width of side piece each side of it; the sixth 

 ventrite with a broad flat central part almost truncate at apex with a 

 rather deep, broad groove (as broad as central part of plate just before 

 apex) each side, the apical outer tip of this groove bears the small tooth 

 or booklet; the central part extends beyond groove by about 0.5 the 

 width of latter. 



Length of head and thorax 5.3 mm., abdomen 4.3 mm., length of 

 forewing 8.3 mm., rear wing 5.7 mm.; length genitalia 0.93 mm., 

 width 0.55 mm., length of subgenital plate 1.13 mm., width 0.47 mm, 



Holotype Male: Neuquen, Catan-Lil, Argentina, 1954, F. H. Walz 

 (USNM). 



71. Auplopus schausi, new species 



Figures 54, 55 



Holotype male. Clypeus yellowish white except for about 0.3 of 

 width in middle is dull greenish, the apex white across, the apical 0.25, 

 with a narrow hairless rim ; broad inner orbits whitish to above base of 

 antennae; rest of head and thorax a rather bright green, with violet 

 and purple reflection ; abdomen black with bluish and violet reflection ; 

 clypeus and face with strong silvery pubescence that hides the j^ellowish 

 color in certain light; thorax with prostrate, rather dense silvery 

 pubescence over most of surface ; abdomen with bloom that shows up 

 in certain light as broad patches of pubescence on the sides of tergites; 

 sides of first and second tergites slightly yellowish; the last tergite 

 white; mandibles black on basal half, yellow on apical half and all 

 mouth parts yellow; all coxae greenish on sides, black on ventral sur- 

 face, yellowish on apex; the fore trochanters yellow, middle pair black 

 with yellow apex, last pair black with bluish reflection and yellow 

 apex; all femora and tibiae yellow; all tarsal joints of forelegs j^ellow 

 except the apical one, the last two pairs tarsi black; antennae brown on 

 top, yellow below; clypeus 2.0 as wide as long; middle interocular 

 distance 0.56 the transfacial; head 1.25 times as broad as long; upper 

 interocular distance (80) is greater than the lower (70) ; the ratio of 

 length of first four antenna! joints is 40:12:65:60; lateral ocelli 1.2 

 as far from eyes as from each other; wings hyaline; subgenital plate 

 with a high ridge as high as width of side plate ; sixth ventrite without 

 grooves as in A. coracinus. 



Length head and thorax 5.0 mm., abdomen 3.3 mm., fore wings 7.6 

 mm., rear wings 5.1 mm.; length genitalia 0.80 mm., width 0.40 mm., 

 length subgenital plate 0.80 mm., width 0.40 mm. 



