368 . POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



Lamyctcs fulvicornis Meinert. 



This is a small, slender, parallel-sided species from 7 to 10 pr., 11 mm. 

 ill length. The dorsum is yellowish brown in color ; the head and prehensorial 

 feet are darker, reddish, the head usually deeper in color anteriorly; the 

 antenns are yellowish red and darker at base than distally. The caudal 

 margins of all the dorsal plates are straight or rounded, the angles of none 

 being produced. The antennae have from 24 to 29 (mostly 25) articles. 



The author has taken this species in Oregon not far from the California 

 Iwrder within which it doubtless occurs. 



Lainyctes pinanipus, sp. nov. 



Very close to the preceding species ; but manifestly more slender through- 

 out. Among various points of difference the most conspicuous are in the 

 anal legs which are decidedly more slender and relatively much longer. This 

 may be seen in the accompanying figures, both of which were drawn by means 

 of the camera lucida on the same scale of magnification. 



This species was first taken by the author at Las Vegas, Nevada. In 

 California it seems to be common at Clareniont from which place specimens 

 collected by C. H. Chen and A. Sugg have been studied. 



Genus Zygethobius Chamberlin. 

 One species of this genus is thus far known. 



Zygethobius dolichopiis Chamberlin. 



This species is considerably larger than the species of Lamyctes, meas- 

 uring from 11.4 to 12.6 mm. in length. The body is manifestly attenuated 

 from the 10th segment cephalad. It is mostly brown in color with the head 

 distinctly darker, reddish to almost black : legs yellow, darkest distally ; an- 

 tennae yellow to brown, darker proximally. The posterior angles of the 9th, 

 11th, and 13th dorsal plates are strongly produced. Antennae with 39 or 40 

 articles. 



Occurring widely in cool moist places in the Wahsatch and Uintah Mts. 

 of Utah at elevations above 8.000 feet. In California it has been taken in 

 the Sierras near Truckee (author). 



Family Lithobiidac. 

 The spines borne upon the legs of the members of this family are im- 

 portant in the diagnosis of species. It is customary to enumerate those oc- 

 curring on the ventral aspect of the first, penult and ultimate pairs, those 

 found at the distal ends of the joints from trochanter to tibia inclusive being- 

 listed in order; thus, 1, 3, 3, 1, where trochanter bears one, prefemur 3, femur 

 3, and tibia 1. The number and arrangement of the ocelli is also of importance 

 in the discrimination of species. It is advantageous to give the number of 

 horizontal series in which the ocelli fall and to enumerate the number of 

 ocelli in these series in order frcmi above vontrad. There is commonly a large 

 single ocellus a little caudad of the main group which is separately reckoned ; 

 e. g., 1 and 5, 5, 3, 2. The number of prosternal teeth on the two halves 



