22 PROCEEDINGS OF THE NATIONAL MUSE I'M. vol.xxiv. 
ti.^. Coxal pores in a single series, transverse; anal feet with a single claw. 
I). Posterior coxje unarmed beneath. 
r. Articles of the antenna^ S8-48; prosternal teeth, 10 to 14; spines of anal 
legs, 1, 3, 3, 2 .forjicatus ( Linnaeus) 6 
a 3. Coxal i)ores in a single series, round. 
Jt. Pf)sterior coxa? unarmed beneath. 
r,. Articles of the antenme, 20; coxal ]iores, 3,3,3,3; ocelli, 10; prosternal 
teeth, 5-.5; length, 7.5-9 mm 'ititfrniovtmms, new species 7 
c-i. Articles of the antenmip, 28-32; coxal pores, 2,3,3,2 — 3,4,4,4; spines of 
first legs, 0, 0, 1; of anal, 1, 3, 3, 0—1, 3, 1, 0; length, 7-8.5 mm. 
purpvmts, new species 8 
I. LITHOBIUS BIPUNCTATUS Wood. 
It has seemed well to include a description of this form, as it has not, 
before been rediscovered or redescribed since Wood established the 
species in 180;^). 
De^cThjption. — Color, dark amber brown, th(^, head lighter; legs mostly- 
pale, posterior pairs and the antennse somewhat darker. Antennte, 
length, 16.5 mm, reaching to the eighth segment; pilose, articles 20. 
Ocelli, 18-22, in T series. Prosternal teeth, 9-9, black; the space 
between the second and third from the outer side much wider than 
between the other teeth. Spines of the legs, first, 2,3, 1; penult, 1, 
3^ 3, 2 — 1, 3, 3, 3; anal, 1, 3, 2, 1. The anal legs are long and slender, 
not at all (U'assate. Coxal pores round or somewhat oval; arranged in 
3-4 series in an oval patch. Genital forceps, claw long and pointed, 
tripartite, the middle lo})e largest, the outer lobe nearer apex than the 
inner; basal spines 3-3, the outermost largest. Length of body, 28. T 
mm; width of tenth dorsal plate, 3.9 mm; length of theanal legs, 16 mm. 
irah/tat. — P]migration Canyon, near the mouth. A nundier of speci- 
mens were taken in the dirt-tilled crevices of the rock in a limestone 
quarry. 
2. LITHOBIUS UTAHENSIS, new species. 
Dia(/nos'is. — This species is related to Litliohlus ohesus Stuxberg, but 
the claw of the genital fcrrceps is tripartite, the spines of the anal legs 
are 1, 3, 2, 0, and the size is always smaller. It is also near Litliohius 
eigenmanni Bollman, from which it is distinguished by the coxal pores, 
which are small and less in numl)er, by the number of spines of the 
anal legs, and by the ocelli, which are fewer. 
DeKcription. — Color yellow to brown, legs and antenna^ paler. 
Antenna?, length 2.6-3 mm.; hirsute; articles 20-22, gradualh' decreas- 
ing in length from the first few to the end. Ocelli 5-11, but mostly 
5-8, arranged in tt- 5 series. Prosternal teeth 2^ — 2, small, pale. Spines 
of the first legs 1, 2, 1-2, 3, 2; of the penult 1, 3, 3, 1—1, 3, 3, 2; of the 
anal 1, 3, 2, 0. The posterior coxa? laterally armed. The coxal pores 
small, round, 2, 2, 2, 2 — 2, 3, 3, 3. Genital forceps, claw tripartite, the 
middle lobe longest, the outer smallest; ))asal spines 2-2, rather stout, 
the outer usuall}^ thicken«^d upward and somewhat bifid at apex. 
