Albistyla

Marshall, Stephen A., 2014, Albistyla, a new genus of Neotropical Limosininae (Diptera: Sphaeroceridae), Zootaxa 3793 (2), pp. 257-264 : 259

Key to the species of Albistyla

1) First abdominal tergite (T1+2) conspicuously large, over 3X length of T3. Mid tibia of male with apicoventral bristle longer than tibial width. Sternite 5 of male with a single pair of conspicuously large bristles extending over posterior lobes ( Fig. 7 )..................................................................................................... 2

- First abdominal tergite (T1+2) not greatly enlarged, 2X length of T3. Mid tibia of male with apicoventral bristle shorter than tibial width. Sternite 5 of male with only clusters of uniformly sized bristles ( Fig. 2 )................................................................................... Albistyla fimbriata new species. Costa Rica, Ecuador, Venezuela.

2) Mid tibia with mid and apical bristles ventrally............................... Albistyla occulta new species. Ecuador.

- Mid tibia ventrally with only apical bristle ( Fig. 15 ).................... Albistyla spatulisterna new species. Costa Rica.

Figures

FIGURE 15. Albistyla spatulisterna female, photograph of mounted specimen.

FIGURES 6 – 8. Albistyla occulta male abdomen. 6, ventral; 7, sternite 5; 8, phallus and associated structures left lateral, with hypandrium. Figs. 9 – 10: Albistyla females, spermathecae. 9, A. occulta; 10, A. spatulisterna. Abbreviations: S 3 – 5, sternites 3 – 5.

FIGURES 1 – 5. Albistyla fimbriata male abdomen. 1, S 5 posteroventral, showing fimbriae (Costa Rican specimen); 2, segments 4 – 8 ventral; 3, terminalia left lateral (S 5 lateroventral); 4, phallus and associated structures left lateral; 5, epandrium and surstyli posterior. Figures 2 – 5 are from the Ecuadorian specimen. Abbreviations: S 5 – 8, sternites 5 – 8. T 5, tergite 5.