6 The Crasj^edosomatidee of North America. 



Suborder Cambaloidea. 

 Family Pseudonannolenid.^, — genus Pseudonaunolene. 

 Distribution: South America. 



Pamily NANNOLENlDiE, — genera Nannolene, lulomorpha. 

 Distribution : Western North America and South Africa. 

 Family Cambalid^e,— genus Cambala. 

 DistT'ibution : Eastern North America. 



Family Cambalopsid^, — genera Cambalomorpha, Cambalopsis, G-lyphiulus, 

 Trachyiulus, Trichocambala. 



Distribution : Southern Asia. 



Family AECHllULiDiE, — genera Archiiulus, Archicambala, type A. dawsoni 

 (Xylobius dawsoni, Scudder). 



Distributio7i : Fossils from the Sigillarian stumps of the car- 

 boniferous beds of Nova Scotia. 



Suborder lULOiDEA. 

 Family luLiDJi;, — genera Allaiulus, Anaulaciulus, Bracbyiulus, Chromatoiu- 

 lus, Cryptoiulus, Cjdindroiulus, Diploiulus, Hemij)odoiulus, lulus, Mesoiulus, 

 Micropodiulus, Pachyiulus, Palseoiulus, Tacbypodoiulus, Typliloiulus, Unci- 

 ger, Xestoiulus. 



Distribution : North Temperate Zone. 



Family Paeaiulidje, — genera Paraiulus, Pseudoiulus, Ptyoiulus, type P. 

 pennsylvanicus (Brandt). 



Distribution : Temperate North America. 



Family P^romopid^e, — genus Pseromopus. 



Distribution : California. 



Family Blaniulid^, — genus Blaniulus. 



Distribution: Europe. 



Family IsoBAXlD^, — genus Isobates. 



DistiHbution : Europe and Temperate North America. 



Suborder Siphonoiuloidea. 

 Family Siphonoiulid.e, — genus Sipbonoiulus.* 

 Distribution: Sumatra. 



*This most remarkable form is probably worthy of ordinal rank and might 

 be called Khinognatha. The absence of legs from the third and fourth seg- 

 ments indicates want of affinity with the Colobognatha, while the form of the 

 head and antennte will doiibtless exclude it from the Diplocheta. 



