10 S. U. Scudder — European Fossil Cockroaches. 



II. — The European Species of Etoblattina, with Description 

 of a New Form. 



By Samuel H. Scudder. 



FOR the convenience of students a first essay is here made to 

 tabulate the European species of Etoblattina, the genus of 

 Cockroaches most numerously represented in Carboniferous times, 

 both in Europe and America. All the species described up to the 

 present time are introduced, together with a new British species, 

 a description of which is added. It will be seen that Deichmuller's 

 var. Stelzneri (regarded by him as a form of E. flabellata) and 

 Geinitz's var. dyadica (regarded by hirn as another form of the 

 same) are considered distinct species ; and that E. Rollei, Deichm., 

 is not included, this last being more probably a Gerablattina. 

 E. Peachii, Woodw., is also omitted, as the tegmina are undeveloped 

 and therefore present no features which could admit it into the table. 

 On the other hand, Blattina intermedia, Gold., formerly described by 

 me as a Gerablattina, has had new light thrown upon it by Kliver, 

 showing it to be an Etoblattina, and it is accordingly introduced 

 here. 



Table of the European Species of Etoblattina. 



a 1 . Tegmina broad, at most but little more than twice as long as broad ; the medias- 

 tinal area usually broad at base, here generally occupying a third 

 or more of the tegmina. 

 b l . Mediastinal area tapering gradually, and relatively long, more, often much 

 more, than four times as long as greatest breadth. 

 e 1 . Relatively slender, the tegmina distinctly more than twice as long as broad. 

 d l . Apical margin divided between the scapular and externomedian areas. 



1. E. Labachcnsis. 

 dr. Apical margin divided between the externomedian and internomedian 



areas 2. E. intermedia. 



c 1 . Tegmina broad, not more than twice as long as broad, the immediate apex 

 occupied by the externomedian branches. 

 d l . Tegmina less than twice as long as broad; mediastinal area reaching 

 nearly to the middle of the distal half of the tegmina ; externo- 

 median vein first forking not before the middle of the tegmina. 



3. E. propria, 

 dr. Tegmina twice as long as broad; mediastinal area hardly extending 

 beyond the middle of the tegmina ; externomedian vein first 

 branching far before the middle of the tegmina. 



4. E. Deichmi'dleri. 

 b 2 . Mediastinal area tapering rapidly and relatively short, less, often much less, 

 than four times as long as basal breadth. 

 e l . Internomedian area long and numerously branched, falling but little short 

 of the apex of the tegmina. 

 d 1 . Humeral angle prominent, the tegmina less than twice as long as broad. 



5. E. Steinbachensis. 

 d 2 . Humeral angle roundly excised, the tegmina more than twice as long as 



broad ' . . . . 6. E. primccva. 



c 2 . Internomedian area relatively short and with few branches, falling far 

 short of the apex of the tegmina. 

 d l . Mediastinrd vein with frequent branches ; scapidar branches few, mostly 



forked deeply or compound I.E. Deanensis. 



d~. Mediastinal vein with infrequent branches : scapular branches numerous, 

 mostly simjde or only apically forked . . . 8. E. lanceolata. 



