DESCRIPTION OP THE SPECIES. 245 



ceptible; there is also a trace of the whitish stripe above the 

 root of the wings ; but this stripe shows no trace of the dark_ 

 border on the inside, which it has in T. electa; nor do I see a 

 whitish median line. Scutellum comparatively smaller and some- 

 what more convex, without black spot on the lateral corners. 

 The upper border of the metathorax is marked, at each end, with 

 a very small spot of a deep black color. The punctiform black 

 lateral dots, which exist on the last abdominal segment of the 

 female of T. electa, are not perceptible in the male of the present 

 species. All the bristles of the body are less strong and of a 

 paler color, especially upon the femora, and instead of the com- 

 paratively long black bristles with which the upper side of the 

 hind tibia? of T. electa is fringed, there are in the present 

 species only very short pale yellow bristlets. The third longi- 

 tudinal vein of the wings has, at its basis, several little bristles, 

 but upon the remainder of its course, is entirely bare (while the 

 bristles extend much farther in T. elecla). The picture of the 

 wings is very like that of T. electa, with the following differ- 

 ences : the two crossbands in the middle of the wings do not 

 altogether reach the posterior margin and are also less approxi- 

 mated, that is, they do not form the figure V ; the basal portion 

 of the submarginal cell lying before the first of these bands is 

 hyaline; the picture in the vicinity of the root of the wing is 

 much less extended and much paler, so that its darker portions 

 do not, as in T. electa, form a kind of crossband, running almost 

 parallel to the following band. 



Hob. Yukon River, Alaska (R. Kennicott). 



Observation. T. flavonotata is very closely allied to those 

 European species, which I have placed in the genus Zonosema 

 (in my Monograph of the European Trypetidse), and should be 

 placed in it, as long as it is separated from Spilographa. Should, 

 however, Zonosema be united with Spilographa, which seems the 

 best course to follow, owing to the intermediate forms, which 

 occur among the exotic species, then, as a matter of course, T. 

 flavonotata will have to be placed in the genus Spilographa. 



14. T. tetanops n. sp. . (Tab. XI, f. 15.) Mellea, oapite subin- 

 flato, oculis parvis ; alae hyalinse, fasciis duabus adversus margiuem 

 posticutn couvergentibus, strigula interjecta hide a costa ad tertiam 

 usque venam pertinente, maculis denique duabus parvis, altera in venae 

 longitudinalis tertiae, altera in quartae apice sita, fuscia, his maculis 

 limbo marginis tenuissiuio fusco conjunctis. 



