Review of the Helochares (Hydrobaticus) MacLeay of the New World (Coleoptera: Hydrophilidae: Acidocerinae) Short, Andrew Edward Z. Girón, Jennifer C. Zootaxa 2018 2018-04-09 4407 1 29 50 Short & Girón, 2018 Short & Girón 2018 [151,549,476,502] Insecta Hydrophilidae Helochares Animalia Coleoptera 19 48 Arthropoda species sp. a Hydrobaticus   Figs. 2E, 5H, 10B.    Materialexamined (5).   PERU: Jauja Province: Junin Department, Sani Beni( 8 km. S. Satipo),   840 m.,  17– 30.viii.1935, leg. F. Woytkowski(1: SEMC); same data but  16–21.vi.1935(2: SEMC);  Samedata but  24.vi.1935, and with additional label that states, “Label data do not agree with field notes” (1: SEMC); “ Vic San Pedro”,  900 m,  15–19.v.1935, muddy pools, leg. F. Woytkowski(1: SEMC; abdomen missing)   Differential diagnosis.Body size 5.2–5.5 mm. Clypeus appearing dark brown in median third, with lateral thirds distinctly paler ( Fig. 5H). Pronotum darkened on elytral disc ( Fig. 2E). Elytra with ten rows of serial punctures, usually appearing weakly impressed into striae. Abdominal ventrites uniformly dark brown; pubescence dense and evenly distributed, the longest hairs shorter than those on the metaventrite. Aedeagus unknown.   Distribution. Peru( Fig. 10B).   Biology.The label data of one specimen indicates it was collected in a “muddy pool”.   Remarks.This species is known from 5 poorly preserved specimens, four of which are female (a fifth specimen is missing the abdomen and cannot be sexed). The specimens appeared to have become moldy some time ago, and all are missing parts of appendages. Though the specimens are distinct and intact enough for them to be easily diagnosed from the other six described species, we consider it is best to wait to describe this species until male specimens in better condition can be found. At present, these specimens represent the southern extent of the range of  Hydrobaticusspecies in the New World. 2608702027 1935-08-17 1935-08-30 1935-08-17 SEMC S. Satipo & F. Woytkowski Peru 840 Sani Beni Department 19 48 840 Junin 2608702180 [667,1129,618,643] 1935-06-16 1935-06-21 1935-06-16 SEMC S. Satipo & F. Woytkowski Peru 840 Sani Beni Department 19 48 1 Jauja Province 2608702031 1935-06-24 SEMC Peru Same 19 48 1 Jauja Province 2608702024 1935-05-15 1935-05-19 1935-05-15 SEMC F. Woytkowski Peru 900 Vic San Pedro 19 48 1 Jauja Province