ORTHOl'TKKA— ACKIDII. 225 



miiiating In the middle of the apical margin ; the interspaces above the lat- 

 ter fork, above the base of the former and the postradial area, are filled with 

 frequent stout and straight cross- veins, while the interspace betwee.i the 

 radial branches is filled by more distant, often oblique, straight veins, form- 

 ing squarish cells. The membrane appears to have been hyaline and the 

 veins and ci'oss-veins distinct and black. 



Length of wings, 22'"'"; breadth of preanal area, 2.35""". 



Florissant. One specimen. No. 9100. 



CEDIPODA Latreille. 



A number of European species have been referred to this genus, but 

 only in a broad sense, and, as I have stated above under the family, may 

 most of them be more definitely placed. Here, however, must fall both O. 

 oeningensis Heer and the American species described below, as belonging 

 to the genus in its widest sense, and the Aix species mentioned by Serres 

 may also probably find a place here, as Serres compares it to the type of the 

 genus. In its most limited sense the genus is confined to the Old World. 

 (July, 1884.) 



ffiDIPODA PK.EFOCATA. 

 PI. 17, Fig. 5, 



The single specimen found represents the liasal half of a hind wing 

 overlying a similar part of an obscure front wing. By the venation and 

 markings it appears to belong to the (Edipodidee, but it is too imperfect to 

 judge more closely of its affinities. The wing- was a large one, fuliginous, 

 with at least three parallel and equidistant curving rows of paler (or 

 brighter) markings in the form of rather narrow bands, the unddle one 

 apparently in the middle of the wing the broadest and discontinuous, cross- 

 ing most of the wing ; the inner one, midway between this and the base, 

 narrower and crossing the upper half or less of the wing. In the anal area 

 the intercalary veins run far in toward the base of the wing, and in the 

 oviter half become broken into two or even more, so that several rows of 

 cells lie between the anal rays next the outer portion of the wing. 



Length of fragment, 23™"* ; probable length of wing, 30"'"' ; its proba- 

 ble breadth, IS""' ; breadth of tegmina, 4""'. 



Florissant. One specimen, No. 7389. 



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