March, '08] ENTOMOLOGICAL NEWS. 127 



rest of their course gently convex below. The veins, as in Cyrto- 

 phillites, are crossed by numerous transverse veinlets ; these occasionally 

 branch. 



The maculation consists of light spots on a ferruginous-brown ground 

 of various degrees of darkness ; the spots cluster along the veins, and 

 are conditioned largely by the transverse veinlets. This maculation is 

 very different from that of Lythymnetes, in which the spots are mostly 

 round and midway between the principal veins. 



Hab. Florissant; Miocene, Station gL/C^. P. Cockerell, 

 1906). 



The interpretation of the venation of Palaeorehnia was not 

 at once evident ; the union of the media with the cubitus and 

 its later departure therefrom, is a confusing character, only 

 readily understood by comparison with other types. Curiously 

 this character is present in the ancient and extraordinary in- 

 sect Eiigereon bockingi Dohrn., from the Permian. The 

 same character is found in the anterior wings of the Neu- 

 ropterous Sialis and Raphidia. Among the fossil Orthoptera 

 the union of the cubitus with the media is found in Cyrto- 

 pJiyllitcs rogeri, an insect with broad tegmina having many 

 points of resemblance to Palaeorehnia, together with very im- 

 portant differences. In the ordinary Acridiidae the cubi- 

 tus bends upwards toward the lower branch of the media 

 and at the point of closest approach there is a cross-nerv- 

 ure. It is perhaps permissible to assume that this indi- 

 cates descent from a form in which the nervures actually 

 joined. Among the specimens and figures of recent Orthop- 

 tera available, I was not able to find any genus in which the 

 media and cubitus fused in the manner of Palaeorehnia. Mr. 

 Rehn has very kindly sought for this character among the far 

 better materials at his command, and has found it essentially 

 as in Palaeorehnia and Cyrtophyllites, in the Phaneropterid 

 genus, Tetrachoncha Karsch., 1890. This genus is exclusively 

 African, with four known species. In the Pseudophyllinae 

 Mr. Rehn found tendencies to the same condition in a great 

 number of diverse genera, but in no case true coalescence. In 

 eighteen genera of Phanopterinae he found tendencies similar 

 to those just described for Acridiidae ; the character of the 

 cross- vein varying, the approach being very decided in 



