ON THE SYSTEMATIC ARRANGEMENT OF THE SPECIES. 61 



3. Of the remaining thirty-one species seven, the five first with all 



certainty, the two last with great probability, most be placed 

 among the Ortalidce. These are : antillarum Macq., flexa 

 Wied., fulvifrons Macq., picta Fabr., quadrivittata Macq., 

 interrupta Macq., tdbellaria Fitch. 



4. Consequently twenty-four N. A. Trypetce have been described, 



namely: acidusa Walk., asteris Harr., avala Walk., beau- 

 voisii R. Desv., comma Wied., culta Wied., dinia Walk., 

 electa Say, fucata Fabr., lichtensteinii Wied., longipennis 

 Wied., mevarna Walk., mexicana Wied., Narytia Walk., 

 nigriventris Macq., obliqua Macq., oUiqua Say, ocresia 

 Walk., quadrifasciata Macq., scutellaris Wied., scutellata 

 Wied., solidaginis Fitch, sparsa Wied., and villosa R. Desv. 



5. Of these twenty-four species I possess four only [now five. 



O. S.], which I shall fully describe hereafter ; they are : electa 

 Say, longipennis Wied., solidaginis Fitch, sparsa Wied. [and 

 obliqua Say. 0. S.]. Moreover I have seen in other col- 

 lections four species ; they are : comma Wied., culta Wied., 

 lichtensteinii Wied., and scutellaris Wied. As an addition 

 to my paper I subjoin the descriptions which Wiedemann 

 has given of them, and accompany them with drawings of 

 the wings, which, however, on account of their being only 

 fugitive sketches, have not the. same claim to correctness as 

 the figures of the wings of the other species. 



6. On the systematic arrangement of the species to be described. 



Besides the above mentioned four species I have to describe 

 nineteen new ones, which I leave all united in the genus Trypeta. 

 Though they differ in their organization, I think my course is both 

 reasonable and proper. It has been already sufficiently shown, 

 how very uncertain the limits of the family Trypetidce are. For 

 the immediate purpose, it will be quite sufficient if insects of other 

 families are no longer mixed with these. The niimber of accurately 

 known species must increase considerably, before a convenient 

 classification can be thought of. 



The smaller genera hitherto founded on the various forms of the 

 Trypetina are partly formed on European species, partly estab- 

 lished in a very superficial manner on single species of other parts 



