62 EDWARD NORTON. 



small ; lanceolate cell very small, with an interrupted cross-nervure in 

 bracliial cell above it. Length 0.36. Br. wings 0.96 inch. 



2. Ptilia filiformis, u. sp. 



Black; the anterior angle rufous, most of the legs white; antennje long, fili- 

 form, ciliate ; wings sub-hyaline. 9- Length 0.28. Br. wings 0.72 inch. %. 

 Length 0.24. Br. wings 0.54 inch. 



9 . Shining black ; antennae as long as to base of abdomen, very 

 slender, curled, gradually decreasing to tip, thickly ciliate; labrum 

 hairy, palpi black, second joint white; head and thorax polished; an 

 orange-colored spot on shoulders covering tegulae, anterior angle and 

 behind; legs black, the tips of coxas, trochanters, four anterior femora 

 at apex and tibiae, except at tip, all of posterior femora and their tibiae, 

 except at tip, white ; all the tarsi blackish ; spurs rather obtuse, claws 

 simple ; wings violaceous, subhyaline, nerves, stigma and costa black ; 

 appendiculate cell very small; the first and second submarginals of 

 equal length, third about two-thirds as wide below as above; the first 

 recurrent nervure received in middle of second submarginal, and the 

 second at junction of second and third; lanceolate cell widely contracted; 

 under wings two middle cells; their lanceolate cell very small, with an 

 imperfect cross-line above. 



% . The male has the third joint of antennae bifurcate, very slender, 

 ciliate, curled ; the spot on anterior angle extends over one-half of 

 pleura; abdomen slender. 



Cordova, T. C. Mexico, (Coll. of H. deSaussure.) 



The difference in the form of the antennae is very marked, as well 

 as the position of the recurrent nervures. 

 .'5. P. brasiliensis, Lcpol.. Monogr. 1823, 60, 143, 9 •—Brazil. 

 4. P. (Hylotoma) ephippiata, Klug, Jahrbuch., 1834, 242, 63, '^.—Surinam. 

 0. P. (Hylotoma) gonagra. King., Jahrbuch., 1834, 241, 61, 9-— South Brazil. 



6. P. (Hylotoma) ovalis, Klug, Jahrbuch., 1834, 241, 62, 9 .—Montevideo. 



7. P. pubicornis. 



Hylotoma 2>ubicornis, Fab., Syst. Piez. 21, 5, 9 9 • 



rtilia! jmbicornis, Lepel., Monogr. 50, 144. — South America. 



8. P. (Hylotoma) plumicornis, Klug, Jahrbuch. 1834, 241, 60, 9.— Brazil. 



Posterior tibice witJi a side spur. 



24. HYLOTOMA. 



Jli/Iotoma, Latr., Nouv. diet. d'Hist. Nat. Fabr., Div. 2*'---, Pal. de Beaiiv, Leach, 



Lepel. t, Klug*, Ilartig, Stephens, &c. 

 Arge, Scliank. 



Cryptus, Jurine, Hym. 1807, 49. 

 Tenfhredo, Linn., Schank, Ames. &c. 



Wiiitj!^ with one marginal, appendiculate, and four submarginal cells. 



