Four New Western Diplopods 



BY KM. I'll V. CHAMBERl.IV 



Of the following previously iintiamecl species of millipedes, three are fr<im Cali- 

 fornia ami one from Arizona. The diagnoses are separately published in order that 

 the names may he available for early use elsewhere. 



Hra( liyjesmus (altjornicus sp. nov. 



This species, the first of the geni:s to be described from this country, seems to be 

 fully congeneric with the numerous species described from the eastern hemisphere. 



The general color of the dorsum is dark brown mesally, but the carina are paler, 

 in part somewhat light yellow. Legs and aiitenns brown. 



\'ertigial sulcus obsolete. Head densely clotiied with short straight seta". .Antenns 

 long, strongh' enlarged distaii. 



First dorsal plate iiecideill> narro\Ner than heati with mandibles, but \vider than 

 head pioper. Anterior margin in the middle region straight, curving caudad at each 

 end to the lateral angle; caudal margin straight over the middle, oblique at the 

 ends, with tubercles verv distinct, setigerous, in four rows or irregularly in five. 



(-)ii the other metazcnites the transverse sulcus between the first and second rows 

 of tubercles deep, dividing the tergites almost equally, the caudal division but little 

 the larger. Tubercles strongly marked, these of the third row much smallest. Anterior 

 corners of keels in anterior somites i;early rectangular, but in the others distinctly 

 drawn forwards. Lateral teeth of carini distinct, three in front of the one at the 

 caudal corner. I'pper surface of keels covered with crowded, distinct tubercles. Keels 

 not at all elevated, in litie \\'n\\ niiddorsum. 



Sternites in itiale each wlllt a distinct cruciforin impression. 



Above the base each g'lujpod is in the form of a thiii blade which w iilcns 

 clavatelv distad, there forining a concave, somewhat spoonlike body from which arise 

 on the distal end two acute teeth or processes of which the one on the mesal side 

 is much the longer. 



Length about S.5 mm. 



l.iHiilily. California: Stanford. One male. 



LrptoJesmus (Isaplie) simflrx sp. nov. 



From the other known species of this group, /. niiiviwn from Idaho, the present 

 species is readily distinguished in having the anterior prong of the gonopod consider- 

 ably shorter than the posterior prong which is also much broader and more plate-like, 

 but which is narrowed regularly distad to an acute point. The two principal blades 

 cross each other in the middle line; but the prongs of each gonopod are widely 

 divergent, not distally as in lunvcxa. 



The general color of the dorsum Is brown of a somewhat chestnut cast with the 

 carina" bright yellow. .Antenna" and legs yellow. 



\'erligial sulcus distinct, eiuliug at the level of the upper borders of the an- 

 tennal sockets. 



Dorsum stronglv convex, the keels near middle of height of the somites. Surface 

 sinooth and shining. The caudal margin of the first tcrgite is mesally straight, bend- 

 ing convexlv forward on each side and then somewhat co.-.cave just mesad of each 

 end so that the ectal angle appears to bend caudad slightly. The carinx of the 

 immcdiati-lv following somites are bent forward. In going caudad the posterior sides 



