270 4. Data relating to Siberian Dragonflies. By A. Bai'tenef (Warshaw, Russia]. (With 7 figures.) 1. Dragonflies collected by S. Chugunof in the region of Oby-Enissei canal (Narymski district Tomsk government). 1) Leptetrum quadrimaculatum L.; q'. 2) Leucorrhinia dubia var. tschugunovi var. n. Q: This variety differs from Leiicor. dubia Lind., typ., in the following respects: The base and the spots at the sides of the upper lip are yellow. The frontal tubercle (vesicula verticalis) is black without spots. The triangle of the occiput (cuneus) is marked with a yellow spot in the hinder part, The thorax between the wings is yellow. The yellow spots of the 2'^ and 3' segments of the abdomen are smaller than those of Lene, dubia. In addition to the black spots found at the base of the fore and hind wings of Leuc. dubia there are also at the base of both pairs of wings a black stripe between the subcostal nervure (costal nervure Kirby) and the principal radius (subcostal nervure Kirby) and at the base of the fore wings a black stripe on the lower basal cell occupying all the basal half of cell to the first cross nervure. All the spots on the wings are surrounded with a sharply defined fringe of saffron colour. The body is smaller: length of the abdomen — 23 mm, length of the hind wing — 24 mm; pterostigma — 2 — 2,25 mm. Four Q. The male is unknown. 3) Sympetrum flai'eolumJj.\ Ç. 4) Somatochlora gratiosa sp. n. (fig. 1 and 2'. 2 2 : The colour of the body is dark bronze. The labium, rhinarium, a triangular spot beside each eye, the middle line and hinder margin of the anterior surface of the thorax (devant du thorax Selys), the hinder margin of the 1^* segment of the abdomen, the cross stripe on 2'^' segment-broken in the centre and turning upward at the sides to the margin of the first segment, all the anterior margin, a large oval spot on each side of the anterior half of the 3'^ segment, the under surface of the abdomen and vulvar lamina — are yellow. The vulvar scale (lamina) is not notched, a little raised and blunt at the end, in length from 2/3 to "Y4 of the 9^'' segment. The 9"' and 10"' segments together are equal to the 8*''. Anal appendages are longer than 9"' and 10"' together. The ab-domen does not narrow in the 3'' segment. The legs are black. The wings transparent, a little dingy between the nodus and the apex of the wings. Plerostigma is light brown. The membranule is white. Fore
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