KBUROrTERA— PLANIPENNIA— SIALTNA. 149 



II m'a suffl de Jeter les yenx sur votre figure 981 pour reconnaitre l'i(lentit(5 par- 

 faite de votre Corydalites fecuudaiu avec des corps fossiles, ayant inetne aspect et meine 

 composition qui out cte recueillis en assez bon uombre et par/aitement cousevves dans 

 notre terrains a lignites de Fuveau pies d'Aix, et justemeut ces lignites sont uiainte- 

 nant rapportes uuiverselleuient au Garumnieu infthieur, et meme plus bas au Gaui- 

 panien, c'est a dire, a I'borizon de la craie supdrieare. II est done tres int^ressant de 

 constater la presence de ces uids ou reuuions d'oeufsde Corydalis, au luerae niveau, en 

 Europe comuie en Amerique et probablemeut dans les ineines conditions de d6p6t. 

 Les Corydalites fecunduni out etc recueillis a Trets pres de Fuveau dans les lits cbar- 

 bonneux exploites, oil ils se trouvent associ6sades feuilles de Nehmibium. II est 

 in^me visible que ces Nelumbium ont v6cu sur place et les Corydalites out du vivre 

 c6te a cote et placer leurs ceufs dans des memes lieiix. 



Corydalites fecundum. 

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



CorydaUtes fecundum Soudd., Bull. U. S. Geol. Geogr. Siirv. Terr., IV, 537-540 (1878); in Zittel, Handb. 

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



(1879). 



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. Tliey 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^ leave little doubt concerning their probable affinities. 

 Mr. Riley's description is as follows : 



Tbeegg-uiass of Corydalus cornutus is either broadly oval, circular, or (more excep- 

 tionally) even pyrifonn in circumference, flat ou the attached side, and plano-convex 

 [broadly convex is doubtless meant] on the exposed side. It averages 21">™ iu length, 

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

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

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

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

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

 eggs by a tbin layer of the same wbite albuminous material which covers tbe whole. 

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



' It has been suggested that these may belong rather to Chauliodes, a closely allied genus of 

 Neuroptera ; but Mr. Riley declares that they are identical with these found iu the body of Corydalus. 



