Apocleinae
Asilinae
Dasypogoninae
Dioctriinae
Laphriinae
Laphystiinae
Leptogastrinae
Ommatiinae
Stenopogoninae
Stichopogoninae
Trigonomiminae
Laphystiinae
References: Artigas, J.N. & Papavero, N. & Costa, C.A. da (1995): The American genera of Asilidae (Diptera): Keys for identification with an atlas of female spermathecae and other morphological details. VIII. Subfamily Laphystiinae G.H. Hardy, with descriptions of five new genera and species. - Arquivos de Zoologia do Estado de Sao Paulo 34(1): 1-55; Concepcion.
In addition:: Hermann, F. (1920): Beitrag zur allgemeinen Systematik der Asiliden. - Zoologische Jahrbücher. Systematik. 2 Abt. 43: 161-194; Jena.
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Dorsocentral bristles extending to anterior slope of scutum and always visible. Scutellar margin with 10 - 20 long and strong bristles and with long hairs on disc . . . . . Zabrops Hull, 1957
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 | Dorsocentral bristles, if present, restricted to post-sutural area of scutum. Scutellar margin with 4 - 5 pairs of hairy bristes, 2 - 4 strong bristles or bare.
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Antenna with two-segmented style. Marginal cell usually closed or closed in the margin . . . . . Laphystia Loew, 1847
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| Antenna without or with one-segmented style. Marginal cell usually open.
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Face extremely narrow, at level of antennae about 1/5 head width. All wing cells open. Scutellar margin with 2 - 4 strong bristles . . . . . Psilocurus Loew, 1874
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| Face wider, 1/4 to 1/3 head width. Cell r5 closed and petiolate. Scutellar margin without strong bristles . . . . . Perasis Hermann, 1906
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Contents: © Fritz Geller-Grimm, Jorge N. Artigas, 2007
Layout & images: © Fritz Geller-Grimm, 2007