14 PROCEEDINGS OF THE AMERICAN ACADEMY 



Fam. TROGULOIDiE. 



Dorsal sc2;ments of the abdomen each with three transverse fields. 

 Palpi and mandibles not visible from above. 

 Kreischeria Wiedei Geinitz (Saxony). 



Order 3. ANTHRACOMARTI Karsch. 



Body composed of two main divisions, of which the front one is 

 uiisegraented, the hinder segmented. Palpi visible from above. 



Fara. ARCIIITARBOID.E Karsch. 



Number of abdominal segments equal above and below. Integu- 

 ment smooth. 



ARcniTARBDS Scuddcr. 



Cephalothorax and abdomen not separated by a lateral constriction. 

 A. roiundatus Scudder (Illinois), A. swioya/Zs Woodward (England), 

 A. silesiacus Roemer (Silesia). 



Anthracomartus Karsch. 



Cephalothorax and abdomen distinctly separated by a lateral con- 

 striction. 



A. Volkelianus Karsch (Silesia). 



Fam. EOPHRYNOID^ Karsch. 



Number of dorsal and ventral segments of the abdomen unequal, 

 more numerous above. Integument tnberculate. 



Eophryiius Prestvicii (Buckl.) Woodward (England). 



Order 4. SCORPIOXES. 



Body separated into three main divisions, the cephalothorax unseg- 

 mented, the abdomen segmented and furnished with a segmented tail- 

 appendage (pcstahdomen). 



Eoscorpius anglicus Woodward (England), E. cnrhonarius Meek 

 and Worthen (Illinois), Microlahis Sternbergi Corda (Bohemia), O/- 

 ch)j)h thai inns senior Corda (Bolicinia), 3Iazonia Woodiana Meek and 

 Worthen (Illinois). 



Whilt! justified in the main in this arrangement, Karsch's definitions 

 of the groups are both insufiicient, and to some extent based on alto- 

 gether subordinate characteristics. The discovery of new American 



