Exomalopsis, Spinola, 1853

Rozen, Jerome G., 2011, Immatures of Exomalopsine Bees with Notes on Nesting Biology and a Tribal Key to Mature Larvae of Noncorbiculate, Nonparasitic Apinae (Hymenoptera: Apidae), American Museum Novitates 2011 (3726), pp. 1-52 : 21-22

EXOMALOPSIS ( EXOMALOPSIS ) BRUESI COCKERELL

Figures 29–31

Following are the first exomalopsine pupae to be described and illustrated. Because the longest series of males and females are those of Exomalopsis bruesi , its pupae are described first; comparative pupal descriptions of other species follow.

FEMALE DESCRIPTION: Head: Integument without setae; most areas microscopically papillate giving integument slight milky, pale appearance. Vertex with pronounced tubercle associated with each lateral ocellus and smaller, but still large, tubercle over median ocellus; following cephalic areas with small blisterlike swellings that sometimes develop small, dark (almost black) spots, these swellings associated with points of contact with surrounding surface (spots possibly resulting from contact): pair on labral apex, one each on anterior apex of scape, on lateral ocellar tubercle; upper surface of compound eye with faint verrucae that may develop one or more dark spots.

Mesosoma: Integument in some areas papillate, without setae. Lateral angle of pronotum sharply projecting; posterior lobe of pronotum with small tubercle. Mesepisternum with linear swelling (accommodating dense adult setae) extending ventrally in front of midleg; mesoscutum with paramedian pair of conspicuous balloonlike (i.e., basally constricted) tubercles; axilla faintly swollen; mesoscutellum with conspicuous pair of paramedian, conical tubercles; metanotum pair of small paramedian tubercles. Tegula with faint varicosities, without tubercle; wings without tubercles but with a few irregular swellings. All coxae each with apical tubercle; all trochanters each with apical tubercle; fore- and midfemora each with basal tubercle; hind tibia (fig. 29) with large basitibial tubercle, tibia and basitarsus swollen, and apical tubercle (accommodating adult scopa) on outer surface elongate.

Metasoma: Integument covered in most areas with minute papillae that become minute spicules on subapical spines. T1–T5 each with subapical row of erect sharp-pointed tubercles, those of T1 moderately small but those of T3–T4 longer; those of T5 smaller; sublateral tubercles of each row tending to be most strongly developed; T6 with only a few fine sharp-pointed spines; metasomal apex with paramedian pair of large terminal tubercles (figs. 29, 31), each with darkly pigmented apical point. Sterna without tubercles; S2–S4 each extending posteriorly as flat lamella.

MALE DESCRIPTION: As described for female except for following: Dark contact spots on head tubercles far less common. Rear hind leg (fig. 30) more slender; apical tibial tubercles shorter. T1 with subapical spines fewer and smaller; spines on T2–T6 fewer than in female; T7 with subapical row of spines. Most of genital appendages exposed.

MATERIAL STUDIED: Twenty-one female and 10 male pupae: Peru: Lima Prov.: 8 km E Chosica , VI-23-95, VII-03-95 (J.G. Rozen, A. Ugarté) .