218 



THE COCKROACH 



and EpilampridcB. Scutinollattina also reminds one in certain 

 features of some Epilampridce, like Phoraspis. The other 

 genera appear to have no special relations to any existing 

 type. As a whole, it would appear as if the Blattaricc spinoste 

 approached closer to the mesozoic forms than do the Blattance 

 muticce. 



Fig. 125. Pterinoblattina intermixta cudd. X 4. Upper Lias, England. 



As to the tertiary Cockroaches we know very little, exceed- 

 ingly few having been preserved, even in amber that 

 wonderful treasury of fossil Insects. Here first we come 

 across apterous forms, Polyzosteria having been recognised 

 in Prussian amber,* together with winged species, which 

 seem to be Phyllodromidce ; these are the only Blattarice spinosce 

 known from the Tertiaries. Of the other group, we have 

 Zetobora, one of the Panchloridce, and Paralatmdia, one of the 

 Corydidce, from American rocks, and Heterogamia and Homceo- 

 gamia, one from Parschlug in Steiermark, the other from 

 Florissant in Colorado, belonging to the sub-family Heteroga- 

 midce. Others are mentioned, generally under the wide generic 

 term Elatta, from Oeningen, Eisleben, Rott, and even from 

 Spitzbergen and Greenland ; but little more than their names 

 are known to us. Paralatindia, from the Green River beds of 

 Wyoming, U.S., is the only tertiary Cockroach yet referred 

 to an extinct genus ; but close attention has not yet been paid 

 even to the few tertiary Cockroaches which we know. There 

 is no reason to suppose that they will be found to differ more 

 from the existing types than is generally the case with other 



* The wingless creature from the Carboniferous deposits of Saarbriicken, described 

 by Goldenberg as a Cockroach, under the name of Polyzostcrites yranosus, appears 

 to be a Crustacean. 



