NE UEOPTERA PL AN1PENNI A SIALINA. 1 49 



II m'a suffi de jeter les yeux sur votre figure 981 pour reconnaitre Fidentite" par- 

 faite de votre Corydalites fecundum avec des corps fossiles, ayant meme aspect et meme 

 composition qui out e'te' recueillis en assez bou nombre et parfaitement conserves dans 

 notre terraius a lignites de Fuveau pres d'Aix, et justement ces lignites sout nminte- 

 uant rapportes universellement au Gariiinnicn inferieur, et meme plus bas au Cam- 

 panien, c'est a dire, a 1'Liorizon de lacraie supe"rieure. II est done ties inte>essant de 

 constaterla presence de ces uids ou reunions d'o3iifsde Corydalis, au meme uiveau, en 

 Europe comine en Amerique et probablement dans les uiemes conditions de ddpot. 

 Les Corydalites fecundum ont etc recueillis a Trets pres de Fuveau dans les lits char- 

 bonneux exploited, ou ils se trouvent associ6s & des feuilles de Neluuibiuin. II est 

 meme visible que ces Nelumbium ont vecu sur place et les Corydalites out du vivre 

 cote a cote et placer leurs oaufs dans des memes lieux. 



CORYDALITES FECUNDUM. 

 PI. 4, Figs. 5-7, 13-16, 18-21, 23. 



Corydalites fecundum Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., IV, 537-540 (1878); in Zittel, Handb. 

 Palaeout., I, II, 776, Figs. 981a, b (1885); White, Rep. U. S. Geol. Geogr. Surv. Terr., XI, 173-174 



(1870). 



Under this name I have classed an insect which laid some remarkable 

 egg-masses, obtained in numbers by Dr. C. A. White, at Crow Creek, fifteen 

 miles northeast of Greeley, Colorado, in lignitic beds of the Laramie group. 

 These egg-masses are five centimeters in length by nearly two in breadth 

 and one in height, nearly equal throughout, rounded and slightly pointed 

 at the tips, and of a dirty yellowish brown. They are estimated to contain 

 each about two thousand eggs definitely arranged, and coated with a cov- 

 ering of what was presumably albuminous matter, which also surrounds 

 each egg. The close general resemblance of these eggs and of their clus- 

 tering to that of the eggs referred by Mr. C. V. Riley to the neuropterous 

 genus Corydalus 1 leave little doubt concerning their probable affinities. 

 Mr. Riley's description is as follows : 



The egg-mass of Corydalus cornutus is either broadly oval, circular, or (more excep- 

 tionally) even pyriform in circumference, flat on the attached side, and plano-convex 

 [broadly convex is doubtless meant] ou the exposed side. It averages L!l""" in length, 

 and is covered with a white or cream colored albuminous secretion, which is gener- 

 ally splashed around the mass on the leaf or other object of attachment. It contains 

 from two to three thousand eggs, each of which (PI. 4, Figs. 17, 22) is 1.3"" u long and 

 about one third as wide [he figures them of a slenderer form], ellipsoidal, translucent, 

 sordid white, with a delicate shell, and surrounded and separated from the adjoining 

 eggs by a thin layer of the same white albuminous material which covers the whole. 

 The outer layer forms a compact arch, with the anterior ends pointing inwards, and 



'II has been suggested that these may ln'long r.itlii-r to Chauliodes, a closely allied genus of 

 Neuroptera; but Mr. Riley declares that they arc identical with those found in the body of Corydalus. 



