26 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.72 



Wings hyaline; bend of fourth vein forming a rounded right 

 angle, the cell open considerably before the apex ; third vein with five 

 to eight rather strong bristles at base ; the costal segment between the 

 auxiliary and the first vein rather longer than usual, about two-thirds 

 of the following one. 



Length, 11 mm. 



Not in the National Museum. 



103. PARAPORIA QUADRIMACULATA Macquart 



Aporia quadrimaculata Macquart, Dipt. Bxot. Suppl., pt. 1, 1846, p. 296. — 

 ScHiNEE, Novara Reise, 1868, p. 319. — Bkauee and Beegenstamm, Denk. 

 Wien. Akad. Wiss., vol. 56, 1889, p. 130, fig. 222. 



• Two specimens from Vienna are male and female. They are 

 labeled "Lindig 1864 Venezuela." They agree with Macquart and 

 Schiner accounts, but are not types. The species is the type of Aporia 

 Macquart, but that name was preoccupied. Townsend proposed to 

 change it to Neaporia ^^ ; as this was later discovered to be preoccu- 

 pied also, he changed it to Paraporia.^'' The species is not represented 

 in the National Museum. 



The specimens are not of the same species as those in the National 

 Museum determined as quadrirrmculata and so accepted by me.^^ 

 These latter (two males) are much more like Vramyia^ having an 

 equally long but somewhat broader abdomen ; they have on the second 

 and third abdominal segments a large dark triangle with its trun- 

 cated apex touching the preceding segment, leaving a cinerous spot 

 on each side at base ; these spots are not widely separated, and fade 

 posteriorly, the rest of the dorsum of the segment being more or less 

 reddish. 



The true quadrimaculata^ agreeing with Macquart's description and 

 figure, is the species from Vienna; it has a much wider and shorter 

 abdomen, velvet black in color, the two pairs of spots farther apart, 

 smaller and much more sharply outlined. It is this form which is 

 the genotype of Paraporia\ there is no doubt of this, as Townsend 

 proposed Neaporia long before he had seen a specimen, and it merely 

 replaced Aporia^ to be itself replaced by Paraporim. Neither genus 

 was based on the specimens now in the National Museum. In this 

 sense I think the genus Paraporiob is a valid one, although in 1921, 

 supposing the specimens in the National Museum to be of the type 

 species, I placed it as a synonym of UramAfia. 



The species which was called quadri/niaculata by me in 1921 I 

 would now call Vromiyia acuminata Van der Wulp, which I errone- 

 ously placed as a synonym. 



18 Muscoid Flies, 1908, p. 67. 



" Ent. Soc. Wash., vol. 14, 1912, p. 48. 



18 Ins. Ins. Menst.,, vol. 9. 1921, p. 85. 



