1. Chrysops amurensis, Plsk. 1910 (=C. binoculatus, Szilady, 1917).

In the type of C. amurensis, Plsk., which is in the Zoological Museum of the Russian Academy of Sciences, the colouration cannot be considered as having attained its full development. The wings are somewhat indefinitely tinged, but there is a fairly distinct preapical spot ; it is rather narrow, and is separated from the main dark part of the wing by a large pellucid portion, curving into the marginal cell ; in shape and position this incurvation is similar to that of C. dissectus, Lw., and C. ricardoae, Plsk. All other features, such as the shape and size of the facial calli, the relative proportions of the different joints of the antennae, and the colour of the abdomen, are similar to those of C. binoculatus, Szil., as given in Szilady's description. The slight difference between the figures given by Pleske and Szilady in the shape of the central spot of the second tergite of the abdomen is probably due to greasing of the lateral parts. Szilady's figure presents the more normal pattern.