444 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



Holotype. — Female, Porto Bello, Panama, November, 1913, Dr. E. 

 Martini, coll. 



Allotype. — Male, topotypic. 

 Type-specimen. — Cat! No. 18499, U.S.N.M. 



Tribe ERIOPTERINI. 

 Genus MONGOMA Westwood. 

 Mongoma Westwood, Trans. Ent. Soc. Lond., 1881, p. 364. 



MONGOMA METATARSATA, new species. 



Cross-vein r just before the fork of R 2 + 3 ', wings subhyaline, stigma 

 small, rounded; legs black with the base of the tibia and the tip of 

 the femur narrowly white; tibia broadly tipped with white; all of 

 the metatarsi black at the base, remainder of the tarsi white. 



Female. — Length, 8.4 mm.; wing, 7.3 mm. Fore leg, femur, 11.6 

 mm.; tibia, 11.7 mm.; tarsus, 9.8 mm. Middle leg, femur, 11.7 mm.; 

 tibia, 10.6 mm.; tarsus, 8.2 mm. Hind leg, femur, 11.3 mm.; tibia, 

 11 mm.; tarsus, 7.7 mm. 



Rostrum and palpi brown. Antennae with the basal segment 

 brownish, the remainder of the organ brownish black; constrictions 

 between the segments of the flagellum not very distinct. Head yel- 

 lowish brown. 



Thorax dull yellowish brown with an indistinct median brown stripe 

 behind; scutum with the lobes indistinctly brown, the median area 

 paler, scutellum and postnotum brown. Pleurae brownish yellow, 

 the sternum yellow. Halteres short, brown. Legs with the coxae and 

 trochanters dull brown, femora brown, darkening toward the tip, the 

 tip broadly white; tibiae with a basal white ring subequal in width to 

 the apical femoral annulus; tip of the tibiae with the apical quarter 

 white, remainder black; metatarsus with the basal quarter black, 

 remainder of the tarsi white. Wings subhyaline, the stigmal spot 

 small, dark brown; veins brown. Venation as in figure 6. 



Abdominal tergites dark brown, lateral margins of the sclerites yel- 

 low, broadest on the first segment, becoming indistinct about mid- 

 length of the organ; sternites brownish yellow. 



Habitat. — Panama. 



Holotype. — Female, Trinidad River, Panama, May, 1911, Aug. 

 Busck, coll. 



Type-specimen. — Cat. No. 18500, U.S.N.M. 



EXPLANATION OF PLATE 24. 



Fig. 1. Wing of Peripheroptera oliviae, new species. 



2. Wing of Teucholabis cockerellae, new species. 



3. Wing of T. buschi, new species. 



4. Wing of T. pleuralis Alexander. 



5. Wing of Orimarga niveitarsis, new species. 



6. Wing of Mongoma metatarsata, new species. 



7. Wing of M. leucoxend Alexander. 



