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setae near posterior margin. stemite IX with oneirregular row of setae. Stemite VI about 4.8 times aswide as long; width/length ratio versus body length.0.8. Segments X-XI telescoped; segments X-XI withone pair dorsolateral. one pair ventrolateral. andfive ventral setae each; segment XII with one pairdorsal. one pair dorsolateral. one pair lateral. andnine ventral setae. Flagellum (Figs. 26-27. 52-54)0.52 mm long, 0.24 mm wide; gradually expandeddistally with triangular apex projecting over pair ofunsclerotized ventrolateral lobes; drn2 seta missing.Pedipalps (Fig. 55): Trochanter not produceddistally. Patella with two short and one long spinosesetae. Tibia with four ventrolateral spinose setae.Spur about 0.3. claw about 0.6 dorsal length ofbasitarsus-tarsus.Chelicerae: Serrula with seven long pointedteeth. Setae: 1=3; 2=6; 3=12; 4=3; 5=0: 6=1.all but seta 6 pilose.Legs: Leg I, including coxa, 4.64 mm long;basitarsal-tarsal proportions: 9:3:4:3:3:3: 13. FemurIV about 3.0 times as long as deep.Female (length from distal edge of propeltidiumto base of flagellum. 4.04 mm). Propeltidium 1.00mm long, 0.60 mm wide. Tergite setation as inmale, except one additional lateral pair each on VIand VII. Sternites V-IX with two distinct rows ofsubmarginal setae. Sternite VI about 4.8 times aswide as long; width/length ratio versus body length.0.8. Flagellum missing. Spermathecae (Figs. 57-58)of one pair of short curved lobes not increasing insize apically. Pedipalp (Fig. 56) length inproportion to body length about 0.7 male pedipalplength. Leg I, including coxa, 3.84 mm long;basitarsal-tarsal proportions: 12:3:4:3:3:3: 10.Femur IV about 2.7 times as long as deep.Measurements (mm).-Male holotype (femaleparatype): Pedipalp: trochanter 0.14 (0.14); femur0.78 (0.50); patella 0.82 (0.46); tibia 0.72 (0.42);basitarsus-tarsus 0.32 (0.22); total 2.78 (1. 74). LegI: trochanter 0.34 (0.28); femur 1.00 (0.78); patella1.06 (0.82); tibia 0.98 (0.78); basitarsus 0.22(0.28); tarsus 0.62 (0.52); total 4.22 (3.46). Leg II:trochanter 0.14 (0.16); femur 0.82 (0.66); patella0.44 (0.38); tibia 0.46 (0.38); basitarsus 0.36(0.28); tarsus 0.34 (0.34); total 2.56 (2.20). LegIII: trochanter 0.20 (0.20); femur 0.74 (0.62);patella 0.38 (0.34); tibia 0.36 (0.32); basitarsus0.42 (0.36); tarsus 0.36 (0.32); total 2.46 (2.16).Leg IV: trochanter 0.54 (0.46); femur 1.04 (0.82);patella 0.54 (0.46); tibia 0.70 (0.60); basitarsus ­(0.48); tarsus - (0.40); total - (3.22).Comment.-Rowland and Reddell (I979a)reported that the paratype female was immature;examination of the genitalia has shown it to bemature.sprousei groupDiagnosis.-Cavernicoles. Medium to largespecies, 5.2 to 8.2 mm total length not includingflagellum. Propeltidium with two pairs dorsal setae.Anterior sternum with one or two sternapophysialsetae. Sternites V-VIII of male with one distinct rowof setae near middle of sternite and one row nearposterior margin. Pedipalp claw about 0.9 to 1.0dorsal length of basitarsus-tarsus. Female pedipalpsequal in length to males. Legs I and IV longer thantotal body length.Distribution.-MEXICO: Tamaulipas.Included species.-P. sprousei n.sp.. Ppurificacion n.sp.Protoschizomus sprousei new speciesFigs. 2-3, 8-9, 28-29, 59-65New species of schizomid: P. Sprouse. 1985:39.Material examined.-MEXICO: Tamaulipas:Cueva del Tecolote. Los San Pedro, 1,450 m elev.•18 Nov. 1984 (P. Sprouse), male holotype(AMNH), female paratype (AMNH); 21 Nov. 1984(D. Pate), 1 immature (TMM); 21 Nov. 1984 (P.Sprouse), female paratype. 2 immature females(TMM); 24 Nov. 1985 (P. Sprouse), 2 male, 1female paratypes. 5 immatures (TMM); 26 Nov.1985 (P. Sprouse), 3 immatures (TMM); 22-28Nov. 1986 (P. Sprouse), 1 immature (TMM);March 1990 (P. Sprouse), 3 immatures (TMM).Etymology.-This species is named for Peter S.Sprouse in recognition of his outstanding work instudying the caves and cave fauna of Mexico.Diagnosis.-Proroschizomus sprousei hassegments/articles I and III-V in the femaleflagellum. The broad basal stalk, more lateralposition of the retractable lobes which curveoutward, and distinctly triangular apex of the maleflagellum separates P. sprousei from other species ofProtoschizomus for which males are known.Description.-Male holotype (length from distaledge of propeltidium to base of flagellum, 6.12mm). Body, pedipalps. and chelicerae orangishbrown; legs light tan.Cephalothorax: Propeltidium 1.80 mm long. 0.94mm wide; with two setae in a row on anteriorprocess, one pair of closely set setae at base ofanterior process, one pair of widely spaced longsetae about 4/9 from distal margin, and one pair55