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202

(1837-1884)
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202

parte inferiore longiore, antrorsum retroque oblique dilatata,
parte superiore breviore, angustiore, superne oblique truncata.

Rostrum deorsum retroque directum, ^ altitudinis capitis
explens.

Hypopharynx valde deorsum retroque curvata, basi
latis-sima, ad apicem acutum versus sensim angustata; setæ sat
longæ, rariores, dimidiam longitudinem hypopharyngis
occupantes.

Lobi maxillarum valde deorsum retroque curvati, basi
latissiini, ad apicem angustum acutumque versus sensim angustati.

Palpi maxillares longiores, crassiores, biarticulati, articulo
ultimo quam primo paulo longiore eoque sat crassiore.

Labium valde deorsum retroque curvatum, articulo primo
dimidiam longitudinem inferiorein labii vix explente, crasso,
I ere cylindrico, articulo secundo et tertio vix discretis, valde
curvatis et attenuatis, apice fere acuto, setis sensilibus paucis,
brevioribus.

Fam. Therevidæ.

Gen. Thereva.

Caput ante et post sat convexum, vertice vix impresso;
antennæ verticem quam labrum vix propiores.

Facies epistomate paulo humilior, fere plana.

Epistoma majus, oblongum, parte dimidia superiore
sub-cornea, reliqua membranacea, subplanum, obliquum; carinæ
validiores, parte inferiore sat crassa, cuin marginibus
laterali-bus pharyngis coalita.

Genæ totæ corneæ.

Hypostoma usque ad membranam articulariam
angustius-culain labii stipitumque maxillariuin corneum.

Pharynx nonnihil exsertilis, fere perpendicularis,
ob-longa, infra angustiuscula, usque ad medium fere valde latior,
deinde ad marginem superiorem paulo angustior, sat excavata,
marginibus lateralibus vix incrassatis, infra cuin carinis
epi-stomatis coalitis, cornibus sat longis, mediocriter crassis, ad

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