HENICOPS DOLICHOPUS, A NEW CHILOPOD FROM 
UTAH. 
By Ralph V. Chamberlin, 
0/ the LaUer-Duy Saints' Culleye, Salt Lake City. 
In a paper on the Lithobiidf\3 of Salt Lake County, published a 
short time aoo in these Proceedings/ the author noted the occurrence 
in Utah of Ilenlcops fulvicornls Meinert, the only form of Henicops 
heretofore reported from North America, although a different species 
{Ilenlcojjs chilensis Gervais) is known from Chile in South America. 
The specimens which were at that time, after a partial examination, 
referred to the species fulvicornh have since been restudied, together 
with more extensive and better material collected during the summer 
of 1901 from various places in the Wahsatch Mountains, and have been 
found to consist of two distinct species, of which the more abundant is 
new to science. IIenlco2)8 falmcornis^ indeed, is represented in these 
collections by only a few specimens taken at the mouth of Miil Creek 
Canyon, whereas more than 75 of the new form have been examined. 
All of the individuals studied, strangely enough, are females; and it 
may be said that so also Meinert, Latzel, and other European natural- 
ists have failed to find a male of Henicops in Europe. The remarks 
as to habitat, made in the paper mentioned, apply in the main to the 
new species, an account of which is herewith given. 
HENICOPS DOLICHOPUS, new species. 
The more essential differences between the two North American 
species of Henicops now known may be tabulated as follows: 
A. Posterior angles of all the dor.sal plates straight or rounded. 
a. Antennas short, articles 24-29 (mostly 25); anal legs short; length of body 
7-11 mm. fulvicornis Meinert. 
B. Posterior angles of the 9th, 11th, and 13th dorsal plates strongly produced. 
a. Antennae long, articles 39-40; anal legs very long; length of body 11.4-12.6 
mm. dolichopus, new species. 
^ Proceedings of the U. S. National Museum, XXIV, pp. 21-25 
Proceedings U. S. National Museum, Vol. XXIV— No. 1270. 
797 
