1978] 
Morris & Gwynne — Cyphoderris 
149 
A third species of Cyphoderris, C. strepitans, is described here. Its 
distribution lies southeast of both monstrosa and buckelli (Figure 
5), populations of strepitans being originally considered as southern 
range extensions of monstrosa (Alexander, 1935; Willey and Willey, 
1963). C. strepitans appears to be most similar in morphology and 
calling song to buckelli but is readily distinguished from the latter 
species by the structure of the male terininalia. 
We have made use of the following abbreviations: ROM/ Royal 
Ontario Museum, Toronto, Canada; UMMZ/ University of Michi- 
gan, Museum of Zoology, Ann Arbor; ANSP/ Academy of Natural 
Sciences, Philadelphia; CNC/ Canadian National Collection, Ot- 
tawa, Canada; MCZ / Museum of Comparative Zoology, Harvard 
University; USNM/ National Museum of Natural History, Smith- 
sonian, Washington, D.C. 
Cyphoderris strepitans new species 
Figures 1 and 2 
The specific name refers to the calling song: strepitans (Latin) 
‘making a great noise’. 
SYNONOMY: 
Cyphoderris monstrosus, Thomas (not Uhler), 1876. Proc. Davenp. Acad. Nat. Sci. 
I, p. 263. Wind River, Wyo. 
Cyphoderris monstrosa, Hebard (in part not Uhler), 1934. Trans. Am. ent. Soc. 59, 
p. 374. Pearl, Col. 
Cyphoderris monstrosa, G. Alexander (not Uhler) 1935. Ent. News 46, p. 30. Park 
Range (Pearl) Col.; ibid 1941. Univ. Col. Studies 1, p. 136. 
Cyphoderris monstrosa, Willey & Willey (not Uhler) 1963. Ent. News 74, p. 200. Los 
Pinos Pass, Col. 
Cyphoderris monstrosa, Evans (not Uhler) 1970. Bull. Mus. Comp. Zool. Harv. 140, 
p. 484. Jackson Hole, Wyo. 
Holotype. Adult o. Park Range 24.7 mi. west of Cowdrey via 
Pearl, nr Big Creek Lakes, Jackson Co., Col., U.S.A.; 19 June 1976; 
Coll. G. K. Morris & D. T. Gwynne (Deposited ROM). 
Description of male type. Body length (fastigium to para- 
procts in dorsal view) 18.6 mm; pronotum inid-line length 7.2 mm; 
caudal pronotum width 7.8 mm; maximum exposed tegminal length 
in dorsal view 8.2 mm; length in lateral view of left metathoracic 
femur 8.3 mm. 
