NO. 1441. AMERICAN PALEOZOIC INSECTS— HANDLlRSi 11 669 



SYSTEMATIC REVIEW OF THE INSECTS AT PRESENT KNOWN 

 FROM THE AMERICAN PALEOZOIC. 



The foUowino- paye.s contain an abridoed characterization of the 

 orders and families into which American Paleozoic insects are divided; 

 further, an enumeration of all forms previously made known, with 

 amended names and localities, as well as the descriptions of 137 new 

 species from the collection of the U. S. National Museum and that 

 of Mr. L. E. Daniels. In the treatment of the species already known, 

 I have confined myself strictly to necessary critical observations 

 and important references to literature. For detailed descriptions 

 and figures of these species the reader is referred to my larger work, 

 that will shortly appear; but for citations, to Scudder's catalogue. 

 The figures of the new species have all ))een prepared by myself with 

 the aid of the camera lucida; hence are claimed to be accurate. All 

 reconstructions have been completed chiefly in stippled lines only, 

 })cr])lexing details of the matrix, Haws, and other things not pertinent 

 to the fossil being omitted. In the description of the neuration of 

 the wing I have made use of the terminolog}- proposed by Comstock 

 and Needham merely for the principal veins (C — costa, Sc = subcosta, 

 R = i"adius, Rs = radial sector, M = media, Cu = cubitus, A = anal), the 

 homologies of which I have been able to determine in all recent and 

 fossil insects. On the other hand, the branches of the main veins 

 and the cross veins I have not been able to homologize; the numbers 

 adopted, therefore, are of value only for the species concerned and 

 have no higher morphological significance. 



My views on the system of recent insects have been already set forth 

 in the publications of the Royal Imperial Academy of Vienna and in 

 the Zoologischer Anzeiger (1904). 



Class PTER^^GOaENE^^ (13iaiier) 

 Etaiidlirscli. 



Order PAL^^ODICTYOPTERA Goldenberg. 



Generallv slenderly l)uilt insects, with 4 similar membranous wings 

 which are independent of each other and move only in a vertical direc- 

 tion, their veins almost exactly corresponding to those in the hypo- 

 thetical type constructed b^' Comstock and Needham." Costa marginal, 

 not branched; subcosta independent, not far removed from the costa, 

 not fui'cate; radius simple, ])reserved to the tip; radial sector spring- 

 ing forth from the radius more or less near to the base of the wing, 

 and dividing in various ways, its branches mainly continuing obliquely 

 to the apical l)order. Media and cul)itus generally with a simple or 

 slightly dichotomous anterior branch and a more strongly branching 



«See American Naturalist, 1898-1899. 



