SYXTORMON. 133. 



Middle and hind coxae blackish-brown with yellowish tip. Feet 

 yellowish, tip of the hind femora brownish-black to a considerable 

 extent. The black hairs on the feet are somewhat sparse and 

 only of middle length ; on the under side of the fore femora there 

 are but a few black hairs of greater length ; upon the under side 

 of the middle femora they are in greater' number ; on the under 

 side of the hind femora only those hairs which are near the tip 

 have a somewhat greater length. Fore tibiae with somewhat 

 longer hairs on the under side, on the upper side with but two or 

 three bristle-like hairs of greater length. The middle and hind 

 tibiae with but few and very short little bristles ; the extreme tip 

 of the latter is infuscated. (Fore tarsi wanting.) Middle tarsi 

 plain, black from the tip of the first joint ; the first joint somewhat 

 longer than the four following together ; on the under side with 

 but two very short black little bristles ; hind tarsi black ; the first 

 joint up to the middle brownish-yellow. Tegulae with a broad 

 black margin, with pale-yellowish cilia. Wings hyaline, some- 

 what tinged with brown, the anal angle less protruding than in 

 most of the other species ; the neuration shows nothing unusual 

 for the genus. 



Eab. Sitka. (Sahlberg.) 



Observation. Although the imperfect state of the above de- 

 scribed specimen did not afford a thorough examination of the 

 hairs upon the upper side of the first joint of the antennae, still I 

 believe to have satisfied myself of their existence. 



Gen. XV. SYXTORMON. 



The generic character is as follows : First joint of the antennae 

 with hairs on the upper side ; the second reaching on the inner 

 side of the third in the shape of a thumb ; third joint of the an- 

 tennae elongated and pointed in the male and shorter in the fe- 

 male ; the position of the arista apical. Scutellum bare. The 

 first joint of the hind tarsi without bristles and a little shorter 

 than the second. The hypopygium small and imbedded, with 

 very small, often not distinctly perceptible appendages. 



The next related genus is Synarthrus, the species of which 

 differ from the species of Syntormon only by the absence of hair 

 upon the first joint of the antennae. Although this character may 

 appear trifling to those who have not studied the family of the 



