222 NORTH AMERICAN TRYPETINA. 



3. T. suspensa Lw. % . (Tab. X, f. 5.) — Tota lutea, alarum rivulis 

 fuscauis, cellula basali secunda et cellulae discoidalis basi non hyalinis, 

 apice venae lougitudinalis quartae recurvo. 



Altogether clay -yellow, rivulets of the wings infuscated; second basal cell 

 and root of discal cell not hyaline, the tip of the fourth longitudinal vein 

 curved forward. Long. corp. 0.21 ; long. al. 0.22 — 0.23. 



Syn. Trypeta suspensa Loew, Monogr., etc., I, 69. Tab. II, f. 5. 



The present species begins a group of very closely allied 

 species, very much resembling one another. I have nothing 

 to add to my above-quoted description of T. suspensa; I will 

 only notice that the absence of pale yellow stripes on the 

 thorax and of a pale yellow coloring of the scutellum cannot be 

 considered as absolutely distinctive of this species, as these marks 

 often disappear in other species in the process of drying. The 

 readiest distinctive mark between T. suspensa and the very simi- 

 lar, but larger T. fraterculus is, that in the former, the second 

 basal cell and the root of the discal cell have a yellowish color, 

 while in the latter they are hyaline. I regret to have to notice 

 here, that the engraver, in figuring T. suspensa, has committed 

 an error in drawing the curvature of the tip of the fourth vein ; this 

 curvature is exactly similar to that in T. fraterculus, that is, run- 

 ning forward ; and although this curved tip in T. suspensa is a little 

 shorter, the difference is not at all such as the figure would lead 

 one to suppose. The second basal cell and the basis of the dis- 

 cal cell should be somewhat paler in the figure, as they are not 

 brown, but only yellow. 



Hab. Cuba (Poey). 



4. T. fraterculus Wied. % . (Tab. X, f. 6).— Lutea, thoracis vittia 

 et scutello dilutius tinctis, ultimo abdominis segmento duobus praece- 

 dentibus simul sumtis paulo breviore, alarum rivulis lutescentibns, 

 cellula basali secunda et cellulae discoidalis basi hyalinis, apice venae 

 lougitudinalis quartae recurvo. 



Clay -yellow, longitudinal stripes of thorax and scutellum paler yellow ; 

 last abdominal segment a little shorter than the two previous ones taken 

 together ; wings with rather clay-yellow rivulets ; first basal cell and 

 root of the discal cell hyaline ; the end of the fourth longitudinal vein 

 curved forward. Long. corp. 0.26 ; long. al. 0.27. 



Syn. Dacus fraterculus Wiedemann, Auss. Zw. II, p. 524. 



Trypeta unicolor L» ew, Monogr., etc., I, p. 70. Tab. II, f. 6. 



