Two new species of Neotropical Leptomorphus Curtis (Diptera: Mycetophilidae).

Two new species of Leptomorphus Curtis, L. guatemalensis sp. n. and L. juxtafurcatus sp. n., are described from Guatemala, figured, and compared with congeners. The new species belong to the clade including the "furcatus" and "walkeri" species-groups as defined by Borkent Wheeler (2012). L. guatemalensis sp. n. can be recognized by the gonocoxite bulbous and crescent-shaped with the apex asetose and spatula-like, but remains without a clear sister-species. Based on the structure of the male terminalia, particularly the presence of submedian, pointed lobes on sternite nine, L. juxtafurcatus sp. n. is suggested to be the sister-species to L. furcatus Borkent from the southwestern USA and northern Mexico; these species can be distinguished by the form of the gonocoxites.

A catalog of the Bibionidae (Diptera: Bibionomorpha) of Chile.

A catalog of the Bibionidae of Chile is provided. We present all valid names and synonyms for the 33 species and 2 genera known from the country, including information about name, author, year of publication, page number, type species, type locality and references. The geographical distribution of the species known from Chile was compiled from bibliographic data and revised collections. Epiplecia Giard, Heteroplecia Hardy, and Pleciodes Hardy are proposed as junior synonyms of Plecia Wiedeman.

A curious new genus of Keroplatini (Diptera: Keroplatidae) from Guatemala.

Amerikeroplatus dimorphicus n. gen. et n. sp. is described from Guatemala and compared with the similar Keroplatini genera Pseudochetoneura Sevcík and Asiokeroplatus Sevcík. The new genus is distinctive because it lacks the typical fusion of M and R (radiomedial fusion, RS+M) which is found in all but a few species-poor, and apparently unrelated, genera of keroplatids. Also unusual is the absence of vein R2+3 and the strong sexual dimorphism in the thorax; males are dark brown and females bright orange.

Phthinia Winnertz (Diptera: Mycetophilidae): new species and records from the Neotropical and Oriental regions.

Three new species of Phthinia Winnertz are described; P. amorimi n. sp. (Chile), P. oliveirae n. sp. (Chile), and P. nepalensis n. sp. (Nepal). Based on male terminalia, P. amorimi shows greater affinity to species previously described from Brazil whereas P. oliveirae is more similar to other Chilean species. Phthinia nepalensis is the first species of the genus described from the Oriental region. Distribution records for other Neotropical species are also given.