Immatures of Exomalopsine Bees with Notes on Nesting Biology and a Tribal Key to Mature Larvae of Noncorbiculate, Nonparasitic Apinae (Hymenoptera: Apidae) Author Rozen, Jerome G. text American Museum Novitates 2011 2011-11-07 2011 3726 1 52 http://www.bioone.org/doi/abs/10.1206/3726.2 journal article 7919 10.1206/3726.2 c50f5780-523a-40db-bade-2289eedfa11d 0003-0082 4565809 EXOMALOPSIS ( EXOMALOPSIS ) AUROPILOSA SPINOLA DIAGNOSIS: Only Anthophorula ( Isomalopsis ) uncicornis and the species of Exomalopsis treated here lack projecting salivary lips. The former species has paired apical mandibular teeth that are acutely pointed, whereas those Exomalopsis that are bifid (in contrast to trifid) have obtusely rounded teeth. Although all species of Exomalopsis dealt with are non–cocoon spinners and therefore lack projecting salivary lips, other species are reported to produce cocoons ( Raw, 1977 ). Head: Antennal papilla about as long as basal diameter, shorter than maxillary palpus. Labrum with apical edge broadly curved in frontal view although forward directed paired tubercles moderately large; epipharyngeal surface bearing dense patch of long spicules on each side; mandibular corium with extremely fine, scarcely visible spicules. Unworn mandibular apex (see Mandibular Morphology) appearing trifid because dorsal mandibular tooth subdivided into to two large teeth; ventral most tooth angling away from two dorsal teeth, so that mandibular apex clawlike in inner or outer views; apical edge of mandible with small apically directed teeth; dorsal edge of cusp with moderately long, evenly arranged row of teeth; ventral edge with row of somewhat larger teeth; spines of planar area smaller than those of dorsal and ventral edges but well developed, abundant. Labial palpus small, about one-half as long as maxillary palpus. Salivary opening without distinct projecting lips, but opening transverse, width about one-third distance between bases of labial palpi. Body: Abdominal segment 10 with patch of strong spicules above and laterad of anus on each side. Spiracular subatrium short, consisting of about six chambers. MATERIAL STUDIED: Four predefecating larvae: Brazil : São Paulo : Ribeirão Prêto , V-10- 1968 ( R . Zucchi) . REMARKS: Nesting biology of this species was treated by Zucchi (1973) .