Male Genital Armature of the Dcrmaptera. Part III. 17 



segment ; last tergite square, smooth, tumid over the insertion of 

 the forceps ; process of pygidium in the male, short, broad, and 

 blunt. Forceps with branches in the male remote at the base, very 

 long and slender, with a small tooth near the base. In the female 

 the abdomen is narrowed and forceps contiguous. 



Male. — Length of body, 13 ■ 5-16 mm. ; ditto forceps, 8-12 • 5mni. 



Female. — Length of body, 12 •5-14 '5 mm.; ditto forceps, 

 5*5-6 mm. 



Range. — New Guinea : Hunsteinspitze, March 9, 1913, eight 

 males, three females, one larva (Dr. Hurgurs, Jr. No. 595, 1913, 

 in Berlin Museum). 



Distinguished by the long and slender build and uniform lilack 

 colour. 



Subfamily Ancistrogastrinjs. 



Very little is yet known of the genitalia of this group. Zacher 

 figures one, with a remarkable virga, under the name of Sarakas 

 aterrimus Bonn. I cannot understand what species he really refers 

 to, as Sarakas is characterized by the non-carinate elytra, and 

 aterrimus Borm. is the true name of amazonensis Borm., which is 

 the type and only known species of Kleter Burr, a genus which has 

 strongly carinate elytra. Zacher's figure is doubtless of a Neo- 

 tropical species ; the metaparameres are typically Forficuline, but 

 the virga is peculiar, and the prasputial sac has a denticulate 

 area. 



Zacher also refers briefly to Tristanella sp., stating that the 

 virga " ist ganz gerade, stabformig," 



I offer Tristanella tube.rculata Bor., in which we find a marked 

 divergence from the Forficuline type. The virga is certainly quite 

 straight, except when protruded, as seen in PI. IV, figs. 8 and 9, of 

 the specimen in erection. In repose it is at least three times as 

 long as the metaparameres. Unfortunately, in both my speci- 

 mens, the basal part of the virga and the vesicle are obscured by 

 a mass of muscle and tissue which is rather heavily stained. 



But it is in the form of the metaparameres that we find the 

 most striking feature. In both my specimens these are of 

 unequal length, asymmetrically bent, both in the same direction 

 and not reciprocally. They are relatively long, bisinuate, narrow, 

 and apically acute ; in fact, they recall the Labiine rather than the 

 Forficuline type. I have examined the tarsi under the microscope. 

 The first and second segments are of equal length; the second is 

 about twice as long as broad, and is rounded — viewed laterally, it 

 is a decidedly Forficuline tarsus ; the basal segment is clad with 

 long hairs, but has no stiff spiniform bristles, neither along its 

 sides, nor at the apex ; the posterior tibiae have a dense series of 

 stiff spiniform bristles towards and at the apex. The tarsi agree 



Feb. 16th, 1916 c 



