254 NORTH AMERICAN TRYPETINA. 



species which are related to Trypeta arctii Deg. and are abun- 

 dantly represented in the European fauna. The most salient 

 features of Trypeta sensu strict, are also the shape of the head, 

 as well as the size and position of the rather broad palpi, which 

 reach beyond the somewhat projecting anterior edge of the mouth. 

 As these characters are easier to perceive than to describe in a 

 few words, the present species deserves to be studied as a type 

 of Trypeta in the narrower sense. 



19. T. ilorescemtiae Lin. % $>. — Ex flavo-virescens, thoracis disco 

 nigricante, postice breviter bifido, maculis alarum hyalinarum quatuor 

 nigris, intennediis fere contiguis, aut in fasciam perpendicularem con- 

 flueutibus. 



Yellowish -green; the blackish color of the thoracic dorsum which does 

 not reach the lateral margin is slightly bifid posteriorly ; the hyaline 

 wings show four black spots, the two intermediate ones of which are 

 almost contiguous, or confluent in a perpendicular crossband. Long. 

 corp. % 0.17, J cum terebra 0.20—0.21 ; long. al. 0.18. 



Syn. Musca florescentkc Linne, Syst. Nat. X, p. 601, 99.] 

 Musca ruficauda Fabkicics, Ent. Syst. IV, p. 353, 169. 

 Tephritis punctata Fallen, Act. Holm. 1S14, p. 167, 12. 

 Trypeta florescentiai Meigen, Syst. Beschr. V, p. 321. Tab. XLVIII, f. 3. 

 Trypeta Jl or escentice Loew, Germar's Zeitschr. V, p. 338. Tab. I, f. 15. 

 Trypeta Jiorescentioz Loew, Europ. Bohrfl. 59, 11. Tab. IX, f. 2. 



Pale yellowish-green. Front, third antennal joint, and palpi 

 usually of a much more vivid yellow. Eyes very much rounded. 

 Face short, excavated ; the anterior edge of the mouth distinctly 

 projecting. Antenna? rather short; the longer bristle upon the 

 second antennal joint but little conspicuous. Palpi comparatively 

 long, reaching beyond the anterior edge of the oral opening. 

 Thoracic dorsum blackish, with the exception, however, of the 

 lateral border and of a cuneiform beginning of a middle stripe, 

 starting from the posterior end, and which renders the black 

 coloring bifid posteriorly. Scutellum immaculate, except on the 

 under side of the lateral angles, and provided with four bristles. 

 Metathorax black. Pleura? more or less infuscated, sometimes 

 rather blackish-brown, with a yellowish-green longitudinal stripe 

 upon their upper side and another across the middle. Abdomen 

 with four rows of conspicuous black spots; its pile, in both sexes, 

 is usually whitish ; however, along the posterior margin of the 

 single segments, some black hairs are usually inserted ; the last 



