File:Bulletin (1971-) (20414463532).jpg

Title: Bulletin
Identifier: bulletin7073sout (find matches)
Year: 1971- (1970s)
Authors: Southern California Academy of Sciences
Subjects: Science; Natural history; Natural history
Publisher: Los Angeles, Calif. : The Academy
Contributing Library: New York Botanical Garden, LuEsther T. Mertz Library
Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden

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1971 NEWSPECIESOF IN 1 KANASAl ( iik.ci i<
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Figure I. Microtrombicula (Crypticula) welbourni, new species. A. Scutum and eyes. B. Dorsal aspect of gna- thosoma. C. Ventral aspect of palpotibia and tarsus. D. Leg I, genu, tibia, and tarsus, showing nude setae (mea- surements in microns) and bases of branched setae. E. Leg II, as above. F. Leg III, as above. G. Body setae: 1 ST, first sternal, H. humeral, PD. posterior dorsal. H. Coxa III. distal branches and several short proximal barbs. Scutal measurements: AW 36 (34. 32-36), PW 50 (48.5, 47-50). SB 21 (20. 19-22). ASB21 (22.21-23). PSB 25 (26, 25-28), AP 28 (31, 28-33). AM 28 (29, 25-33), AL 24 (21, 19-24; 1 1). PL 29 (30. 28- 32), S 60 (57, 53-60; 8). Gnathosoma: Cheliceral blade with small tri- cuspid cap and dorsal 1 nob • hcli capitulai stci num lightly pum tati (ialcala Palpal setae B/B/NbB palpotai \w vilh I nude and 5 blanched setae, and tarsals 9 palpotibii bifurcate, axial prong ilightl unisetose, 2 genualae and microgenuala ! tibialac and microtibiala, tarsala ! I I ! I 6) distal microtarsala, subterminala, parasubtcrminali pretarsala; leg II. coxa unisetose, 2 tibialac tarsala 19(19, 17-20) and proximal nil- imi.,i ,,;., ;, g ;;; coxa with 3 and 4 (3 to 5) In.niched setae, gcnuala tibiala, and I nude niaslitarsala I 19) Leg measurements: I 214 (209. 192-226), II 205 (190, 174-205). Ill 236 (225. 211-239), total '.; (625, 577-655). Remarks. — The cheliceral blade has a prominent knob characteristic of the lour Korean species described by Ah (1964), but not conspicuous among the American Crypticula. The geographic proximity of M. welbourni ' diabola (type localities less than 3 miles apart), may indicate an ecological relationship similar to the two sympatric species Microtrombicula nasal is and \l wrenni Loomis, recovered from the same individuals of several cricetid rodent species in Joshua I rcc National Monument. California (Loomis. I9( This new species is named alter Mr \\ I Welbourn, Jr. of California State College. Long Beach in recognition of his numerous contributions to the studies of trombiculid mites. Specimens examined (17).—-Type series (I2l plus 5 larval skins (WCW700728-I5). LITERATURE CITED Ah, H. S. 1964. New intranasal chiggers of the genus Microtrombicula from some bats in Korea (Aca- rina:Trombiculidael. J. Med. Ent.. 1: 186-191. Loomis. R. B. 1963. The discovery of chiggers (Acarina: Trombiculidae) in the nasal passages of cricetid rodents from California, with descriptions of two new species. J. Parasit., 49: 330-333. Webb. J. P. and R. B. Loomis. 1970. A new subgenus of intranasal chiggers of the genus Microtrombicula from North America and Korea. J. Med. Ent., 7:655-663. Accepted for publication August 31, 197 1.

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