1975] 
Mock ford — Eremopsocus 
251 
Eremopsocus. — E. infuniatus McLachlan (type species), E. cras- 
sicornis (Kolbe) new combination, E. nigripes n. sp. (heretofore 
referred to in this paper as Cerastipsocus sp. no. 1). 
Several species traditionally assigned to Cerastipsocus are unassign- 
able by the above definition, and I hope to review that genus and 
assign these species in the near future. 
Subgenera of Eremopsocus. — Roesler (1944) assigned Syngono- 
soma Kolbe, Diwopsocus Banks, and Podopterocus Banks as sub- 
genera of Eremopsocus. These assignments were presumably made 
on the basis of incrassate flagellomeres alone. As I have shown that 
this character is not a reliable guide to relationships, it seems advisable 
to retain the old-world genera Dinopsocus and Podopterocus at least 
until their external genitalia are known. The type of Syngonosoma 
being South American, it seems likely that this genus may be a 
synonym (not a subgenus) of Eremopsocus as was suggested by 
Enderlein (1911) and Pearman (1933), but is will be necessary to 
examine material of the type species in order to confirm this sug- 
gestion. Of the species listed in Eremopsocus by Smithers (1967), 
only the type species can be retained with certainty. 
Systematics of Eremopsocus species. — In this section the species 
now assigned to Eremopsocus are diagnosed, the description of E. 
infumatus is augmented, a detailed description of E. crassicornis is 
presented and E. nigripes n. sp. is described. A key to the species 
is included. 
Eremopsocus infumatus McLachlan 
E. infumatus McLachlan, 1866: 348. 
E. infumatus venezuelensis Pearman 1933: 159. 
Diagnosis. — First four flagellomeres incrassate in both sexes, the 
basal two decidedly so, the next two somewhat less. Female sub- 
genital plate with a single row of long setae along cross-piece of 
T-shaped mark (the row double to the sides and single in middle 
on specimen examined). 
Explanation of Figures 9-17 
Fig. 9. Eremopsocus crassicornis (Kolbe) 2 , epiproct. Fig. 10. E. 
nigripes n. sp. 2, epiproct. Fig. 11. E. crassicornis (Kolbe) 2 , subgenital 
plate, scale of Fig. 12. Fig. 12. E. nigripes n. sp. 2 , subgenital plate. 
Fig. 13. E. crassicornis (Kolbe) 2 , gonapophyses. Fig. 14. E. nigripes 
n. sp. 2 , gonapophyses, scale of Fig. 9. Fig. 15. E. infumatus McLachlan 
2 , epiproct, scale of Fig. 9. Fig. 16. E. crassicornis (Kolbe) 2 , sperma- 
pore sclerite. Fig. 17. E. nigripes n. sp. 2 , spermapore sclerite, scale of 
Fig. 16. 
