Figs 1, 2

MATERIAL EXAMINED. India: 2 females, Thottilpalam, Kerala; 11 o 68’ N, 75 o 80’ E, altitude 50 m, 19.II 2014, M. Bharti; 1 female, Balehonnur, Karnataka, 13°21’ N, 75°28’ E, altitude 867 m, collected from light source, 5.VII 2007, K.J. David.

DISTRIBUTION. Thailand, Vietnam, India (Kerala, Karnataka). Herein this species is firstly recorded from India.

REMARKS. Stomorhina can be distinguished from other Rhiniinae by bare proplueron, presence of an outer post-humeral seta and R5 open or closed in the margin, R5 is petiolate only in case of xanthogaster (Dear, 1977). The species, S. siamensis is closely related to S. townsendi but differs from other species of the group due to closed R5 vein at the wing margin. It could be separated from closely related S. townsendi by the characters given in the key.

ECOLOGY. Stomorhina siamensis has been recorded from the Thottilpalam and Balehonnur areas falling in the state of Kerala and Karnataka. A fresh water stream passes through the town of Thottilpalam. Lagoons and backwaters characterize the state of Kerala, which receives run-off from the rivers. The place features a highly humid tropical climate with highest temperatures recorded in the month of June (40 oC) and lowest in the month of December (17.5 oC). The vegetation of the place is of varied type which includes west-coast tropical evergreen, semi-evergreen, Southern moist mixed deciduous, grasslands and marshy grasslands. Balehonnur on the other hand is a small city located on the banks of river Bhadra with an average rainfall of 80 inches a year and is dominated by coffee estates, arecanut, paddy fields, pepper, vanilla and other spices.