Contribution to the knowledge of the Argentinean species of Lepidura Townes (Ichneumonidae: Mesochorinae), with description of the male of L. patagonica Araujo & Vivallo

Lepidura Townes is a genus with an Andean distribution of the subfamily Mesochorinae, occurring in Chile and Argentina. Among the 14 species described, the males remain unknown in seven: L. callaina Dasch, L. improcera Dasch, L. mallecoensis Dasch, L. nigricephala Araujo & Vivallo, L. patagonica Araujo & Vivallo, L. seminitida Araujo & Vivallo and L. viridis Dasch. Based on the study of specimens deposited in the Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Argentina, the male of L. patagonica is described and illustrated for the first time. In addition, a new distribution record of L. olivacea Dasch in Argentina is also provided.

Diagnosis Diagnosis.  provided the most recent revision of the genus, which can be identified by the combination of the following character states: ovipositor sheath stout, scale-shaped; head mostly greenish (except in L. rubicunda, L. tuberosa, L. variegata and L. nigricephala); fore wing with large rhombic areolet; hind wing vein CU/1b present, usually spectral; vein CU1a twice as long as cu-a; median longitudinal carina of propodeum present, but incomplete (except in L. improcera and L. nigricephala); and glymma occupying 0.3 of petiole.
Distribution Distribution. Distribution restricted to the Andean biogeographic zone (sensu Morrone, 2015), with species occurring in Chile and Argentina.
Description Description: Male (Figs. 1-3). Approximate body length: 8.5 (mm). Fore wing length: 6.4 (mm); antenna Revista de la Sociedad Entomológica Argentina 78(4): 1-3, 2019 resembling a long rod; female hypopygium large and triangular in lateral view; ovipositor sheath rigid; and ovipositor short and needle-like (Wahl, 1993;. Lepidura Townes, 1971 is a small genus, currently including fourteen species distributed in the southern Andean biogeographic region sensu Morrone (2015) . As well as in other Andean genera of the Mesochorinae, knowledge about biology and behavior of the species of Lepidura is scarce. Recently,  provided an updated taxonomic revision for the genus and described L. nigricephala, L. patagonica and L. seminitida based on female specimens. The males of these species remain unknown.
Herein we describe the male of L. patagonica and provide a new distribution record of L. olivacea in Argentina.

MATERIAL AND METHODS
General morphological terminology is according to Gauld et al. (2002), except for the wing venation and the cuticular microsculptures which follow Sharkey & Wharton (1997) and Broad et al. (2018), respectively. The information contained in the section "Material examined" corresponds to the specimen label verbatim. To describe the adult male of L. patagonica and compare its morphology with female's characteristics, specimens deposited at the following institutions were examined (curators in parentheses): FSCA: Florida State Collection of Arthropods, Gainesville, United States (Elijah Talamas) and MACN: Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Buenos Aires, Argentina (Arturo Roig-Alsina).
Photographs were obtained using a Zeiss Axiocam ERc5s camera attached to a Zeiss Stemi 508 stereomicroscope. All images were treated using Adobe Photoshop® (v. CS5). All measurements were rounded to the nearest 0.05. The abbreviation "T" was used for Tergite, followed by the number of the corresponding tergite. length: 8.1 (mm); number of flagellomeres: 40-42; head 1.20× as wide as high (frontal view); head punctate with sparse whitish setae (Fig. 1); distance between eye and lateral ocellus 1.00× as long as the diameter of lateral ocellus; frons smooth; clypeus 3.00× as wide as high; clypeal sulcus weakly discernible; mandible 2.85× as long as the basal width (frontal view); mandible with two well developed teeth; mandible basal width 1.70× as long as malar space; pronotum polished; epomia present; hind femur 7.00× as long as wide; hind tibia 10.90× as long as wide; hind basitarsus 13.40× as long as wide; mesosoma generally smooth, polished and finely punctate; areolet large, rhomboid, 1.70× as wide as long; hind wing with 5 distal hamuli; propodeum smooth, with isolated punctures; areola absent, but with subpentagonal area delimited by complete lateral longitudinal and posterior transverse carina and incomplete anterior transverse and median longitudinal carina (Fig. 2); area externa, lateralis, petiolaris and postero-externa discernible; T1 smooth, with isolated punctures; glymma deep; postpetiole 1.95× as long as its maximum width; T2 4.10× as long as its maximum height (lateral view); T2-T7 similarly sculptured; Parameres elongated, needle-shaped (Fig. 3).
Comments Comments: Coloration as in female except dark brown on the posterior half of T5. The male of L. patagonica is similar to L. viridis by the absence of vein CU/1b on the hind wing but it differs by the presence of the costula and the anterior transverse carina of propodeum, both absent in the latter species.