24 



U.S. NATIONAL MUSEUM BULLETIN 2 83 



(fig. 37) with lengths of III-XV as 9-6-6-6-6-6-6-6-14-14-14-14-27; 

 AR 1.63; palpal segments lengths as 3-9-11-7-12; mandible with 

 8 teeth; thorax darker yellowish with less distinct brownish markings; 

 leg markings (fig. 44a) fainter, the distal dark band on hind femur some- 

 times quite faint; fore femur with 2, quite often with 3, anteroventral 

 black spines; hind tibia with 2-3 (av. 2.8, n = 24) short, stout, black 

 extensor bristles on distal portion; hind leg with lengths of femur to 

 V as 57-55-28-11-6-5-10; 5-6 hind tibial spines; TR 2.6. Wing 

 (fig. 44c) faintly infuscated, the veins concolorous; usually narrow; 

 CR 0.68; lengths of r-m to stem M as 6:14, medial petiole thus un- 

 usually long. Halter (fig. 446) pale, stem and basal half of knob dark 



Figure 44. — Stilobezzia minuta, new species (a-d, h-i, 9 ; *~g, c? )• #, femur-tibia of hind 

 leg; b, halter; c, wing; d, abdominal terga; e-g, cf genitalia; h, spermathecae; i, 9 

 genitalia. 



brown. Abdomen (fig. 44c?) with large brown lateral patches on terga, 

 much smaller on II; 4-5 hairs in each lateral cluster on I. Spermathe- 

 cae (fig. 44A) subspherical, subequal, without sclerotized necks, very 

 small, measuring 0.037 mm by 0.029 mm and 0.033 mm by 0.027 mm. 

 Female genital sclerotization as in figure 44i. 



Male.— Length of wing 0.86 (0.79-0.88, n=10) mm. 



Tarsal claws shorter than in female, but distinctly unequal. Geni- 

 talia (fig. 44e-a) short and broad; sternum IX with blunt mem- 

 branous lobes; basistyle stout, its mediangular process connected to 

 a slender mesal sclerotized bar; dististyle stout and tapered on proxi- 

 mal portion, abruptly narrowed distally to a slender point; aedeagal 

 sclerites slender, nearly straight, the short sharp distomedian points 

 meeting mesad; parameres short and stout, each with stout lateral 



