. Bulletin. Science; Natural history; Natural history. Figs. 1-4. Lithurge spp., females: 1, L. bitorulosa, frontal view of lower face; 2, L. bitorulosa, dorsal view of supraclypeal prominence; 3, L. planifrons, same; 4, L. echinocacti, same. Stippling indicates extent of punctate areas in Figures 2-4. All Figures drawn to same scale. Lithurge {Lithurgopsis) bitorulosa, new species Figs. 1-2 Lithurge (Lithurgopsis) planifrons: Snelling, 1983:2, 10. <3. [Misidentification]. Diagnosis.— Female: First flagellar segment shorter than second; supraclypeal area with large conical protuberance on e
. Bulletin. Science; Natural history; Natural history. Figs. 1-4. Lithurge spp., females: 1, L. bitorulosa, frontal view of lower face; 2, L. bitorulosa, dorsal view of supraclypeal prominence; 3, L. planifrons, same; 4, L. echinocacti, same. Stippling indicates extent of punctate areas in Figures 2-4. All Figures drawn to same scale. Lithurge {Lithurgopsis) bitorulosa, new species Figs. 1-2 Lithurge (Lithurgopsis) planifrons: Snelling, 1983:2, 10. <3. [Misidentification]. Diagnosis.— Female: First flagellar segment shorter than second; supraclypeal area with large conical protuberance on each side; malar area linear, without posterior pit; upper facet of supraclypeal process conspicuously contiguously to subcontiguously punctate. Male: Tarsal arolia absent; labrum with transverse basal ridge, but without erect spine-like tubercle; supraclypeal area flat, shiny to slightly shiny between contiguous to subcontiguous punctures. Description.— Female, Measurements (holotype in parentheses): head width (); head length (); wing length (); total length () mm. Head: times broader than long; eyes strongly convergent below, upper interocular distance times lower interocular distance. Malar space essen- tially absent, posterior pit absent. Transverse basal ridge of labrum high in center, with deep median excision. Clypeus with narrow, curved preapical ridge, distad of which clypeus is depressed, shiny; clypeal disc shiny, subpolished between coarse very variably spaced punctures, but with interspaces up to three times. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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