Extracted from: Snelling R.R., (1990). A Review of the Native North American Bees of the Genus Chalicodoma (Hymenoptera: Megachilidae). Contributions in Science, Number 421, pp. 1-39.|
Male mandible with prominent process on lower margin; procoxal process prominent; protarsal seg-ments expanded and excavated and probasitarsus with basal row of distally hooked setae on anterior margin; discs of fourth and fifth terga black pubescent. Female unknown.
MALE. Measurements (mm): Holotype HW 2.41; HL 2.67; WL 7.0; TL 9.0. Paratypes: HW 3.18-3.74; HL 2.46-2.97; WL 6.0-7.0; TL 9.0-10.0.
Head about 1.3 times as broad as long; inner eye margins weakly convergent below, upper interor-bital distance about 1.1 times lower interorbital distance; in frontal view, preoccipital margin strongly elevated above eyes and ocelli. Mandible (Fig. 19) with large, triangular submedian process on lower margin; apex tridentate, inner tooth large, acute. Labrum normal, apex truncate and margins parallel. Clypeus nearly flat, apical margin weakly incurvate, with a pair of strong submedian tubercles, margin between them weakly convex; coarsely, subcontig-uously punctate near base, becoming finely rugo-sopunctate distad; a weakly defined median im-punctate line on basal one-half or less; interspaces slightly to moderately shiny. Supraclypeal area and frons dull, with contiguous moderate punctures (about 0.04 mm diameter); vertex and preoccipital area slightly shiny between fine, subcontiguous punctures; gena shinier, punctures fine to moderate, subcontiguous. Pedicel about 1.5 times longer than first flagellar segment, latter broader than long; second flagellar segment 2.2-2.5 times longer than first. Interocellar distance greater than ocellocular distance; ocellocular distance greater than ocelloccip-ital distance.
Mesoscutum slightly shiny between moderate, subcontiguous punctures; scutellum similar but a little shinier; metanotum dull, with sparse minute, obscure punctures; mesepistemum mostly dull, moderately and contiguously punctate (rugoso-punctate in some areas), but punctures a little more separated below; metepisternum and side of pro-podeum dull, punctures fine to moderate, contiguous, but variably rugosopunctate in some areas; propodeal disc moderately shiny and sharply tes-sellate, but with variable fine rugae on either side at base.
Procoxa with sparse ferruginous bristles over en-tire ventral surface and with dense patch at base of distal process, the process flattened and a little lon-ger than broad. Protarsus broad, concave inner faces of first three segments smooth and shiny; first seg-ment, along anterior margin, with about eight widely spaced, long, ferruginous bristles, which are abruptly curved mesad near their apices; probasitarsus with mastigion; last protarsal segment slender, slightly longer than proximal segment.
First metasomal tergum moderately shiny be-tween fine, subcontiguous punctures; terga 2-4 shiny between fine to moderate punctures, interspaces mostly about one puncture diameter or a little more; tergum 5 similar but punctures mostly subcontiguous; tergum 6 dull, contiguously finely punctate, carina conspicuous in dorsal view, bilobed (Fig. 10), apical margin with prominent lateral teeth, sub-median teeth prominent, acute (hidden in dense hairs); exposed sterna slightly to moderately shiny between fine, contiguous to subcontiguous punctures.
Hidden sterna. Fourth sternum hidden but not modified. Sternum 5 (Fig. 39) with lateral portion (="presternite" of Mitchell, 1935) long and narrow; asetose in center (="medasternite" of Mitchell, 1935), with submedian patch of stout, apically curved setae, which become longer laterad and complexely branched; with a pair of long, slender preapical lobes, from tips of which arise a cluster of very long, simple setae curved mesobasad; apical margin with setose median tubercle and sublateral cluster of short, stout, profusely branched setae. Sternum 6 (Fig. 40) with lateral portions about as broad as long; median area with mediobasal cluster of short, simple setae and with lateral complex lobules, closely pectinate distad, bearing a few short, stout, barbed setae and numerous long, simple, acute setae; apical margin straight, simple. Sternum 8 (Fig. 41) with scattered, barbed setae on margin distad of lateral process; preapically constricted and with large distal patch of long, branched setae.