Herewith I offer descriptions of three new species of dragon-flies of the subfamily Gomphinæ of Odonata. Figures of the appendages of all will appear in my forthcoming handbook of the dragon-flies of North America.

Gromphus lentulus, n. sp.

Colours obscure (due in part to fading of specimen); face obscure yellowish, shining; frons above and occiput and the ridges above the lateral ocelli yellow, the remainder of the vertex brownish. Prothorax brownish, with a double median spot of yellow on the dorsum. Thorax obscure yellowish, with a faint indication of a pair of narrow stripes of brown beside the middorsal carina, and of broader antehumeral and humeral stripes; a brown pale line on the third lateral suture.