GENUS TREPOBATES HERRICrT-SCIIAEFFER (HEMIPTERA; GERRIDAE) C. J. DRAKE AND F. C. HOTTES The genus Trepobates Herrich-Schaeffer is known only from the Western Hemisphere. This paper enumerates 10 species, includ-ing a new species described from Panama and Mexico. As most of the species are about the same size and very similar in color and markings, they are often confused and wrongly named in collections. Individual variability in color markings is unusually pronounced in most species, and the degree of variability in different species is about the same. Both alate and apterous forms are generally com-mon, and dealated males and females are often encountered during the breeding season. The genus Trepobates is composed of moderately large and ro-bust species wdth long legs. They are very alert and swift. They inhabit the quiet parts of running and protected coves of standing waters. Although primarily inhabitants of fresh bodies of water, most species also live and breed in brackish water near the mouth of streams flowing into the seas. Salt water marshes, lagoons and pools along the sea shore also afford favorable abodes. T. vazquezae Drake and Hottes is the only species of the genus not as yet recorded from fresh water. T. trepidus Drake and Harris and T. taylori (Kirkaldy) are very common and widely disseminated in the tropics, and sometimes are almost as abundant in brackish marshes, lagoons and ponds along the sea coast as in fresh water habitats. TREPOBATES PAXAMENSIS Drake and Hottes, new species Apterous form: Color quite variable, especially the amount of yellow and black on dorsal surface of pro-and mesonotum; gener-al appearance and coloration very similar to T. taylori. Pronotum blackish wdth a broad yellow or orange-yellow stripe on each side. Mesonotum with a broad, bow-like (concave within) yellow stripe on each side, the ends not meeting in front or behind. Thorax be-neath pale testaceous; sides with a broad, sinuate, black-fuscous stripe. Venter and genital segments pale testaceous. Dorsal surface of abdomen bluish black with two oblique spots near the base and most of last tergite yellowdsh. Yellowish marks on dorsal surface more or less tinged with orange. Size: Length, 3.10-3.50 mm.; width, 1.38-1.52 mm. Head: Width across eyes, 1.00 mm. Antennae fuscous-bi-own with base of first segment testaceous; formula — (male) I, 56; II, 35; 35
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