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)

2. Limnobatodinae. „Antennae five-jointed, fifth segment iongest, second and fonrth shortest, body less slender, not more than six times as 'ong as broad: head setae set in non-pigmented areas, in two pairs, one pair on the anterior swollen part and one pair near the anterior margin of pronotum; rostrum reaching mesosternum, omphalium present, tarsal claws subapieal, inserted dorsally". ,,A single genus and species, Limnobatodes paradoxus HUSSEY, is known from Honduras, Central America". Key to Cenera of H y d r o m e t r i d a e . (See Plate IX). A. Antennae four-segmented. B. Pronotum longer than twice the breadth; mesosteruum not sulcated along the median longitudinal line Hijdrometra. LAMARCK BB. Pronotum only a little longer than broad; mesosternum sulcated along the median longitudinal Hne: metasternum with two distinct longitudinal sutures which extend and vanish into the ventral abdominal segments Bacillometra ESAKI AA. Antennae five-segmented; pronotum scarcely longer than wide Limnobatodes HUSSEY The Genus Hydrometra LAMARCK 1801. Specific Characters. In LINNE'S (11) brief latin description of his Cimex stagnorum 1758 there are mentioned no characteristics of specific or even generic value. One by one students have discovered and used various structural characteristics in the differentiation of the species of this genus Ilydrometra. Mr. J. R. DE LA TORRE-BUENO in his exeellent paper on „The Family Hydrometridae in the Western Hemisphere 1926" has summarized these as follows: 1. Proportion of the anteocular part of the head to the postocular. 2. Length of the rostrum >as compared to the head, which is expressed in terms of its extension to or beyond the eyes. 3. Proportions of the antennal segments, particularly between I and II and between II and IV.