Moesz Gusztáv - Soós Lajos (szerk.): A Magyar Természettudományi Múzeum évkönyve 28. (Budapest 1934)
Hungerford, H. B. ; Evans, N. E.: The Hydrometridae of the Hungarian National Museum and other studies in the family. (Hemiptera)
A b d o m e n : The two male processes are located on the ventral side of the sixth abdominal segment, one on each side of the median longitudinal line; each process is about midway between the anterior and posterior marginsof the segment and consists of a small elevation capped with short stiff hairs; the posterior dorsal margin of the sixth segment of the holotype has a fringe of short stiff hairs; in dorsal view the sides of the seventh segment are nearly parallel and the segment presents a very blunt appearance; the terminal dorsal process of the male is sharp and about one-fourth the length of the segment; the terminal dorsal process of the female is sharp and prominent, about two-fifths of the segment in length. Described from three males and six females; the holotype, allotype, and three female paratypes were collected in Annam Laos; two paratypes, one male and one female, bear the following label: „Formosa Sauter, Takao, 1907". All of these specimens are from the Hungarian National Museum, Budapest. Two paratypes, a male and a female, from the Paris Museum were collected in Nhatrang by A. KREMPF in 1913. N o t e s. We have in the University of Kansas Collection two specimens from Tokio, Japan sent us some years ago by R. TAKAHASHI. Hydrometra Butleri SP. N. (Plafe VJ). Size and Color. Length, 11.25 mm (male holotype), 11.0 mm (male paratype); the general color of the body is a brownish-yellow; the hemelytra has a longitudinal white stripe. Structural Characteristics. Head: Length, 103 units (holotype), 97 units (paratype); the ratio of the anteocular part of the head to the postocular part is given by the formulas AO:PO: :67:28 (holotype), 63:27 (paratype); the dorsal interocular groove of the holotype is equal in length to the diameter of an eye, fine and shallow; the ventral interocular groove is longer, extending to about onehalf the postocular distance; clypeus bluntly conical and polished; the rostrum surpasses the eyes by about two-fifths of the postocular distance; the antennal segments of the holotype, beginning with the basal one, are in the ratio 17:39:X:40; the third segment could not be measured accurately due to its curvature. Pronotum: Length, 54 units (holotype and paratype); an encircling row of pits parallel to the anterior margin and close to it:
