INSECUTOR INSCITI^ MENS'TRUUS '93 



to fourth segments, the pollen border narrowest on second 

 segment. Legs black, front femora silvery on outside. Wings 

 faintly smoky. Tegulse whitish. 



Holotype, No. 19958, U. S. Nat. Mus. 



Phantasiosiphona, new genus. 



Genotype, Phantasiosiphona tropica Townsend, new species. 



Differs from Crocuta as follows: Parafacials linear, greatly 

 constricted. Facial length twice that of front. Third antenna) 

 joint enlarged in both sexes, but more so in male ; its upper 

 edge showing straight profile in both ; its lower edge showing 

 evenly rounded profile in female, but unevenly rounded in 

 male due to the greater apical broadening of the joint in that 

 sex. Second aristal joint very elongate, nonnally nearly half 

 as long as final joint. The arista is thickened on hardly more 

 than basal half. Head much higher than long, eyes elongated 

 dorsoventrally. Approaches Phasiostoma in head characters, 

 but differs markedly therefrom in the long and twice-geniculate 

 proboscis. 



Phantasiosiphona tropica, new species. 



Length of body, 4 to 4.5 mm. ; of wing, 3.5 to 3 mm. One 

 male, San Rafael, Jicaltepec, Veracruz, March 11, 1896 

 (Townsend) ; one female, Granada, Nicaragua (Baker). 



Face and cheeks silvery-white, frontalia subfulvous, para- 

 frontals and thorax including scutellum cinereous wath more 

 or less of brassy tinge, first two antennal joints dull rufous, 

 third joint and arista black, palpi light fulvous. Abdomen 

 dull luteous, with pale brassy to whitish pollen ; a broken 

 median vitta of blackish, dilated posteriorly on second segment 

 in a median pair of spots ; third segment with four rather 

 indefinite dark spots on hind border, anal segment dark pos- 

 teriorly. Legs concolorous with abdomen, tarsi black. Wings 

 evenly tinged with fuscous, both scales of tegulse tawny-whit- 

 ish. Proboscis fulvous at base and tip, broadly black at genicu- 

 lation. 



Holotype, No. 19959, U. S. Nat. Mus., male. 



Tachina singularis Wd. (Auss. Zw. II, 335), indicated by 

 Jaennicke as Siphona (Neue Ex. Dipt. 87:395), appears to bo- 



