Vol. XXV | ENTOMOLOGICAL MEWS 2O/ 



Molophilus Sagittarius sp. n. ( Tl. TX, fig. 4.) 



Color brown; male antennae short; ventral appendage of the male 

 hypopygium simple, its caudal margin with about six long serrations. 



Male. Length, about 3.8 mm. ; wing, about 6 mm. Palpi dark brown, 

 antennas brown, short, the flagellar segments oval ; head grayish brown. 



Pronotum enormously enlarged, fitting around the cephalic margin 

 of the mesonotum like a life belt, bright yellow. Prasscutum and 

 scutum dark brown; scutellum yellowish brown; postnotum dark 

 brown. Pleuras dark brown. Halteres entirely light yellow. 



Legs, coxae and trochanters brownish yellow ; femora yellowish 

 brown ; tibiae and tarsi brown. 



Wings subhyaline, veins brown, rather distinct. 



Abdomen dark brown. Hypopygium with the ventral appendage 

 ( See Plate IX, figure 4) simple, flattened, its outer margin with about 

 six long serrations. 



Female. About as in the male but the pronotum is not conspicu- 

 ously swollen and is not yellow ; the thoracic praescutum has indica- 

 tions of three darker dorsal stripes ; wings a little browner. 



Holotypc, male, Coroico, Bolivia. Allot \pe, female, Callanga, 

 Peru. Paratype, female, Cillutincara, Bolivia. 



Allied to M. per sens Alexander 7 , of Colombia, but the 

 ventral appendage of the male hypopygium is much less regu- 

 larly serrated on its outer margin and the teeth are fewer 

 (about 6 instead of 10 or 12) and longer; dorsal lobe very 

 small and narrow. The hypopygium of .17. guatemalensis 

 Alexander 8 has never been described and so I 'figure the 

 ventral hypopygial appendage (see Plate IX, fig. 3) ; the ap- 

 pendage is simple, sickle-shaped, on the outer side near the 

 base with a sharp point. 







Genus Gnophomyia Osten Sacken. 



1859. (i'iit>rlioinyia. Osten Sacken; Proc. Acad. Nat. Sci., Phila., p. 

 223. 



Gnophomyia luctuosa Osten Sacken. 



( )ne female from the Sierra, San Lorenzo, Colombia ; Uj- 

 heyi, collector. 







7 Alexander, Journ. N. Y. Ent. Soc., vol. 21, pp. 201, 202; pi. 6, 

 figs. 4, 5 (1913). 



8 Alexander, Proc. U. S. Nat. Mus., vol. 44, No. 1966, p. 511 (1913). 



