274 EDWARD NORTON. 



17. M. trisyllabus. 



Allantus irisi/llabus, Say, Harris' Cat. 



Korton, Bost. Jour, vii, 1860, 238, 5, 9 . 

 Macrophi/a triayllabus, Norton, Bost Proe. ix, 118. 

 Blaek; a band on antennse, collar, V-spot, scutel and spot on coxse white. 

 Tiength 0.40. Br. wings 0.80 inch. 



9 . Body long, abdomen cylindrical; antennoe rather long, apex; of 

 fifth, the sixth, seventh, eighth and base of ninth articles white ; nasus 

 produced and not deeply notched; edge of nasus, disk of labrum, a 

 spot at base of mandibles, palpi, edge of collar, V on anterior lobe, scu- 

 tel, a line at apex of metathorax, edge of basal plates and of first four 

 segments of tergum pale yellow ; legs black, a large spot on posterior 

 coxae white ; a narrow line on most of four anterior legs beneath, all 

 the trochanters, and (in some cases) the joints of the tarsi yellowish ; 

 wings slightly clouded, nerves black ; lanceolate cell closed. 



S . The male has the venter more or less white; the four anterior 

 legs beneath and the postcrier legs below femora white ; all the tro- 

 chanters and anterior legs above, yellowish. 



Canada, Mass., Conn., N., Y., III., English River, Saskatchewan, 

 (Smiths. Inst.) Mexico. 



Common. The females are abundant, the males rare. In some 

 cases the V-spots and all marks back of the scutellum are indistinct or 

 wanting; sometimes the ventral segments are tipped with white. 



18. M. zonalis. , 



Macrophya zonalis, Norton, Proc. Eut. Soc. Phil, iii, 1864, 11, 21. 9 • 

 Black ; the tips of antennae, mouth, collar, V-spot, scutel, three spots on pleu- 

 ra and a baud on each segment of abdomen white. Length 0.44. Br. wings 0.1)2 

 inch. 



9 . Body long, shining black; antenmx) long, apes of fifth and the 

 fourth apical joints white, tip brown ; head polished, having obsolete 

 punctures; nasus slightly incurved; labrum almost truncate; a spot 

 above ocelli, a dot below antenn;e, nasus and mouth, collar, V-spot, 

 scutel, a band at base of each segment of abdomen, enlarged at sides 

 and beneath, a spot below the anterior wings, a cross stripe below the 

 posterior wings and a triangular spot in middle of pleura, white; legs 

 black, the two anterior pair and the posterior feniora white beneath, 

 and a large white spot on posterior coxa); the four apical tarsi of four 

 anterior legs white, their tips black; posterior tarsi black, their first 

 joint nearly as long as all the rest; wings faintly clouded on their api- 

 cal half, nervures blackish. 



Massachusetts, (Coll. Am. Ent. Soc.) One specimen. 



