. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. ORTALID/EâII1M KIU»K8SA. 85 the two posterior basal ct' aro raiiicr striking for their lorge size; however, the anal cell, which has an obtuse pudttirior rjiglc, is shorter than the basal cell lying in front of it; the small cross- veni is in the middle of the discal cell; the lirst half of this cell is by no meaus attenuated, as is the case iu the species of RivclUa. llab. Carolina (Zimmerman); Washington, D. C, Connecticut (Osteu-Sacken). Gen. II. niMEROESSA nov. gen. Charact.âFront oi equal
. Monographs of the Diptera of North America [microform]. Diptera; Insects; Diptères; Insectes. ORTALID/EâII1M KIU»K8SA. 85 the two posterior basal ct' aro raiiicr striking for their lorge size; however, the anal cell, which has an obtuse pudttirior rjiglc, is shorter than the basal cell lying in front of it; the small cross- veni is in the middle of the discal cell; the lirst half of this cell is by no meaus attenuated, as is the case iu the species of RivclUa. llab. Carolina (Zimmerman); Washington, D. C, Connecticut (Osteu-Sacken). Gen. II. niMEROESSA nov. gen. Charact.âFront oi equal breadth, distinctly projecting in profile. AnteniKB reacliing almost to the mouth, arista bare. Face moderately excavated, somewhat retreating belovr; occiput moderately turgid, eyes high ; cheeks narrow. Srutellum convex ; with six bristles. Willys: marginal and submarginal cells very narrow; second section of the fourth longitudinal vein straight; posterior croiisvein pro- longed beyond the fourth vein; posterior angle of the anal cell rounded. As I have seen only a single species of this genus, the one which is described below, the definition of the generic character can naturally be only a provisional one. Should the peculiar prolongation of the posterior crossvein, which distinguishes JI. pretiij^a, be wanting in some allied species, it would then be necessary to omit this character from the definition of the genus; the remaiuiiig characters are amply sufficient for the purpose. ⢠'â .'â *. , â ' * ft V . :i':^ â â â ,â¢;.!-:$?â ,'!; â¢â , , ⢠â . 1 â T,^.^*â 'â â ^^⢠â ; â â â ' . .-:'.:â ,â ⢠^ ;â .'â â ⢠â â ; k^i, ^' 1« Ht pretiosa n. sp. % .â(Tab. VIII, f. 2.) Rnfo testacea, abdoraine violaceo, pedibns anticis totis, posteriornnique tibiis et tarsis nii^ris; als hyalinse, inxquali costse limbo et fasci4 tenui subiuterrupta nigro- fascia. Yellowish-red, with a violet abdomen ; the front feet altogether, the tib
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