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)

Hydrometra transvaalensis sp. n. (1'late II). S i z e a n d C o 1 o r. Length 10.5 mm (male holotype); the general color of the bodv is a dark brown; the dorsal part of the head and the ventral part of the thorax are lightly frosted; the ventral part of the abdomen is heavily frosted; the pronotum with a narrow, longitudinal, median, frosted line bordered successively on each side by a narrow, dark purplish-brown band, a broader light yellowish-brown band, and a broad dark purplish-brown band, the last band lying on the margin of the pronotum; a narrow frosted stripe extends along the lateral margins of the thorax; a median longitudinal white stripe on the hemelytra which is slender and broken only by the veins which cross it. S t r u c t u r a 1 C h a r a c t e r i s t i c s. Head : Length, 95 units; the ratio of the anteocular part of the head to the postocular part is given by the formula AO:PO: :58:27 (male holotype); the dorsal interocular groove is about equal in length to the diameter of an eye and is shallow; the ventral interocular groove is about the same length as the dorsal groove but is somewhat deeper; the clypeus is truncate, about one and one-half times as broad as long: the rostrum surpasses the eyes by about four-fifths of the postocular distance; beginning with the basal one the ratio of the lengths of the antennal segments is expressed by the formula 18:33:85? (approximately): 48. Pronotum : Length, 53 units; an encircling row of small pits parallel to the anterior margin and about three units from it; a shallow median groove extends practically the entire length of the pronotum and is pitted on the posterior lobe; the posterior lobe with scattered pits, those near the lateral margins being deeper and arranged more or less in rows. Metanotum : The hemelytra are large and long, extending to the posterior margin of the fifth abdominal segment. C o x a e : The distance between the first and second coxae is to that between the second and third coxae as 32:56; on the right side of the body the anterior acetabulum has one pit anterior to the cleft and two pits posterior to it; the middle acetabulum has two pits on each side of the cleft; the posterior acetabulum is unpitted or has a faint pit or two. F e m o r a : The anterior femora attain the apex of the head while the posterior femora slightly surpass the tip of the abdomen.