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Megachile axyx (Snelling, 1990)
Chalicodoma (Chelostomoides) axyx Snelling, 1990

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Megachile
Subgenus: Chelostomoides

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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.

Female mandible long and slender, with three apical teeth and with prominent conical, preapical process, the margin between the conical process and the innermost of the apical teeth deeply concave and much shorter than the apical width of the mandible (Fig. 21); otherwise similar to female of C. texensis, but legs usually ferruginous or light reddish brown. Male similar to that of C. texensis, but legs ferruginous; pro- and mesotarsi with dense fringe of white hairs along posterior margin of basi-tarsus that are longer than their segment.

FEMALE. Measurements (mm): HOLOTYPE HW 3.23; HL 2.50; WL 6.7; TL 10.2. Paratypes: HW 2.87-3.49; HL 2.36-2.72; WL 5.7-7.2; TL 8.9-12.0.

Generally similar to female of C. texensis, as described below, but with postmedian tooth of upper margin of mandible prominent and margin between it and innermost apical tooth distinctly concave and shorter than apical width of mandible (Fig. 21). Clypeal structure as in C. texensis, but disc rugosopunctate, with narrow, shiny, impunc-tate area across basal margin. Supraclypeal area weakly elevated and with coarser, contiguous punctures. Frons and vertex similar to those areas of C. texensis but frons rugosopunctate. Gena, in profile, about three-fourths as wide as eye, shiny between subcontiguous fine punctures. Pedicel about twice longer than first flagellar segment and a little less than twice longer than second. Interocellar and ocellocular distances subequal and greater than ocelloccipital distance.

Mesosoma, metasoma, and pubescence as in C. texensis.

Color of head and body blackish brown; man-dible dark reddish near apex; scape, pedicel, and upper side of flagellum brownish, underside of fla-gellum lighter. Tegula transparent yellowish red. Femora and tibiae light ferruginous; tarsal segments duskier.

MALE. Measurements (mm): Allotype HW 2.86; HL 2.29; WL 5.9; TL 9.3. Paratypes: HW 2.71-3.33; HL 2.05-2.67; WL 5.5-6.7; TL 7.5-10.4.

Head 1.25-1.32 times as broad as long; eyes weakly convergent below, upper interorbital dis-tance about 1.1 times lower interorbital distance; in frontal view, preoccipital margin arcuately pro-duced above ocelli by less than transverse diameter of anterior ocellus. Mandible as described for C. texensis. Labrum as described for C. texensis, but impunctate area limited to basal one-fourth to one-third. Clypeus as described for C. texensis but very weakly produced in middle, and median impunctate line weak or absent. Supraclypeal area, frons, vertex, preocciput, and gena as described for C. texensis. Pedicel and first two flagellar segments as described for C. texensis. Interocellar distance greater than ocellocular distance, each distinctly greater than ocelloccipital distance.

Mesoscutal interspaces moderately shiny, dis-tinctly tessellate, punctures subcontiguous to dense; mesosoma otherwise as described for C. texensis.

Legs as described for C. texensis, but mesobasi-tarsal fringe long (Fig. 25).

Metasoma as described for C. texensis, but ca-rina of tergum 6 low and shallowly emarginate in middle; hidden sterna and genitalia (Figs. 27, 33-35).

Pilosity as described for C. texensis, but posterior margins of pro- and mesobasitarsi with sparse fringe of yellowish hairs that are conspicuously longer than the segment.

Color as described for C. texensis, but femora and tibiae ferruginous.

Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Bignoniaceae  Tabebuia rosea @ BBSL (1)
Fabaceae  Andira inermis @ BBSL__BERK (1); BBSL (39)

Pterocarpus rohrii @ BBSL (1)
_  Withheld @ BBSL (1)

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Updated: 2019-11-20 14:34:41 gmt
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