260 



"Some New Colorado Orthoptera" (Bruner, '04), in which a key to 

 this genus appears and A. occirhnialis is described from Colorado. 

 This is said to differ from scuddevi "in its somewhat slenderer form 

 and smaller size," in its "somewhat abbreviated tegmina and wings," 

 and "in the fewer (9) spines on the outer row of tlie hind tibire." 

 Scuddei'i is characterized in Bruner's key as having 10 or 11 spines 

 in the tibial outer row and the vertex right-angled or obtuse-angled 

 in both sexes, while in the remaining species, deotum, it is slightly 

 acute-angled. It will be noted that the broad-angled vertex is used 

 by Bruner to distinguish seudderi from dcoruni ; and, on the other 

 hand, by Hancock, to distinguish arenosus from scudderi. Appar- 

 ently arenosvs is not sufficiently distinguished from occideiifalis, or 

 from scudderi as defined by Bruner, and it seems best for the pres- 

 ent to retain the name scudderi for our Illinois examples. Individ- 

 uals from all the Illinois localities herein cited, as well as some tak- 

 en in Wisconsin by Mr. J. D. Hood, agree sufficiently with Han- 

 cock's description of arenosus, as well as with Bruner's characteriza- 

 tion of scudderi just cited. The vertex is usually slightly obtuse- 

 angled. An examination of the spines in the hind tibial outer row 

 of 12 specimens from various localities gave the following result : 

 spines, 9-9 (1 specimen), 9-10 (2), 10-10 (7), 10-11 (1), 11-11 (1).* 



Note 4, p. 233. — Psinidia fenestrnlis. Five eastern specimens 

 of t'enestralis (New Jersey, etc.) in the State Laboratory collections 

 show varietal differences from Illinois examples. Our specimens 

 are smaller — female, 19-23 mm., male, 14-17 mm. — as compared 

 with the eastern examples — female, 25 and 27 mm., male, 18-19 mm. ; 

 and in our examples the wing band is farther from the base. In the 

 eastern specimens it crosses the wing centrally, or a trifle nearer 

 the base ; the first convex radiate vein — that crossing near the wing 

 center — is at least half in the band; and there is abroad hyaline 

 space beyond the band, the apex immaculate in the female. In 

 our examples the band crosses nearer the apex than the base ; the 

 first convex radiate vein is about two fifths in the band ; and 

 the hyaline spot beyond is small, the apex in the female witii evident 

 darker spots at the vein tips and in the subcostal region. In all the 

 males the apex is blackish. 



Note 5, p. 233. — Trimerotropis citrina. Our examples of T. 



* Kehn, in a paper received since the above was written (Proc. Acad. Nat. Sci. 

 Phila., Vol. 58, p. 371), shows that both scvdderi and orrideiilalis are probably syno- 

 nyms of deoriim. 



