New species of the cleptoparasitic bee genus Stelis (Hymenoptera: Megachilidae, Anthidiini) from the Nearctic Region Author Parker, Frank D. Author Griswold, Terry text Zootaxa 2013 3646 5 529 544 journal article 10.11646/zootaxa.3646.5.3 7edfe958-19e9-4c0b-9dd5-6a484f4f15f1 1175-5326 220406 8A0168EE-BB65-4A8C-BA94-5EADBC621F04 Stelis shoshone , n. sp. ( Figs. 9 , 19 , 29 , 39 ) Diagnosis . Stelis shoshone can be distinguished from all other Nearctic Stelis by the apical white integumental bands of the terga ( Fig 9 ). Stelis joanae appears superficially similar to S. shoshone but its apical bands are hyaline. Description . Female: Body length 5.5mm , forewing length 4 mm . Black; reddish medially on mandible, inner margin of fore tibia, tarsi; white bands apically on T1 – T5. Pubescence not thick, plumose, sparse hair on face, mesosoma, terga laterally, erect hair on terga, more dense on apical terga; sterna apically with distinct bands; S6 with short recumbent hair. Punctation fine, close nearly contiguous on most of body but interpunctal area somewhat shiny; T6, S6 closely pitted, dull; Head wider (1.3X) than long; mouthparts short, scarcely extending beyond fossa in repose; clypeal margin crenulate apically; eyes converging below, DLID>(1.3X) BLID; eye wider (1.1X) than gena in lateral view; ocelli normal sized; IOD <(0.9X) OOD> (1.3X) OPD <(1.5X) = LOPD, IOD> (3.0X) LMOD; pronotal lobe not carinate; anterior surface of mesepisternum not concave; scutellum not overhanging metanotum in profile; basal zone of propodeum without distinct pitting; fore, midtibiae with apical spines very short, much smaller than distance between, apical hindtibial spine reduce to low angle, indistinct; TIB>(1.4X) BAT = TAR; terga not lamellate apically, graduli shallow; T6 with apical margin bowed, groove between pseudo and true margin filled with short pile, overlapping S6 ventrally ( Fig. 19 ); S6 short, not extending beyond T6, apical margin round. Male. Similar to female except: T7 with transverse apical margin; S3 – S6 forming basin-like depression; apical margins of S1 – S2 rolled over with plumose hair bands apically; S3 with wide V-shaped medioapical depressed area, apical margin straight with plumose hair band; S4 with narrow (0.1X width of sternum) comb, apical margin with plumose hair band, median area depressed, filled with plumose hairs, plumose hair patch laterally; S5 with apical margin shallowly emarginate, impunctate medially, apical margin with row of setose hair, S6 with apical margin flat medially, disc with central area impunctate, depressed. Type Material . Holotype Female. “ USA UTAH Cache Co Mt. Naomi Trail Aug 21, 1996 F.D. Parker” (BBSL434759). Paratypes . UTAH, Cache Co: 1 Ƥ, Mt. Naomi, 9970’, 5 Aug 2005 , FD Parker, Z Nyiro; 1 Ƥ, 1 3, Mt. Naomi, 0.21 km NNE, 41.9312°N 111.6737°W , 24 Jul 2008 , TL Griswold; 9 Ƥ, Mt. Naomi, 0.30 km NE, 41.9315°N 111.6721°W , 24 Jul 2008 , H Ikerd; 1 Ƥ, Mt. Naomi, 1.46 km SE, 41.9077°N 111.6583°W , TL Griswold; 1 3, Mt. Naomi, 3.24 km SE, 41.9045°N 111.6516°W , 24 Jul 2008 , H Ikerd; 2 Ƥ, Naomi Peak, 0.2 mi NE, 9500-9700', 24 Aug 2006 , TL Griswold; 1 Ƥ, same except OJ Messinger. Holotype and paratypes deposited in BBSL. Distribution . Known from a single alpine locality in the Bear River Range of northern Utah. Biology . Specimens of S. shoshone were collected as they searched the ground in the vicinity of patches of Penstemon where its presumed host bee, Atoposmia ( Atoposmia ) sp. was foraging. These bees were found only in mid August at very high elevations. Etymology . This species is named in recognition of the Shoshone tribe whose home included the Bear River Range.