790 THE AMERICAN XA TURALIST. [\'ol. XXXVl II. 



llu 



K.plnln 



■rlie the mandible 



Ludad 



r the mouth 

 In many 



and between th( 

 si^ecmiens there 



Ntriction of Its caudal portion, while the 

 mesal notch of the caudal margin is also 



l-.arly m the twelfth day are to be 

 seen si<.,ms ot the lobulation of the ist 

 •V ' -Kmhru! of ibout thirteen ^'^^^ ^^^^ maxilhx. I find noindicatiou 

 -Uiyhow^inK antennai scierites of thc l(.)bes of thcsc ajipendagcs arising 

 ^ ^ from separate, isolated cen 



mons ('95a) has described. 



It has been stated that the mandibles of Blatta 

 are always simple. I was interested to find that 

 in a few embryos of twelve to thirteen days thev 

 appear to be feebl> tnlobed I his agrees uith thl 

 condition in (Lcanthus. as desciihed b> A>ers (p 

 24) Koiotneff ( 81) also lepie^cnts the mindibles 

 of (xrvUotalpa as feebh tnlobed (see his iMg 6), 

 though he says nothing about it in the text 



Ihioughout the serie. it is cMdent that thcie is 

 "Ot a t.ct tusion ot tlK antenna u.th the ce 

 l)halic lolx's hilt tl.,. c ■ ■ 



