January 1891. ] 



PSYCHE. 



range seems to be coextensive with that 

 of niveus and it is even more abundant. 

 The earliest recorded date of its capture 

 at Moline is August 23. 



16. Oecanthus latipen?iis Rilev. It 

 is doubtful if this species is found as far 

 north as Moline. There is a specimen 

 in the Museum of the University of Illi- 

 nois labelled Carmi, 111., Oct. 6, '82. 

 Its song has been described as "a con- 

 tinuous, high-keyed trill continued for 

 fifteen minutes or more." This is ex- 

 actly the song of fasciatus. Since 

 there has been so much confusion in the 

 species of this genus, there is a chance 

 that the song described above is mistak- 

 enly referred to latipcmiis. 



17. Oecant/ius bipmictatus De Geer. 

 Apparently an uncommon species in 

 Illinois. I have seen but two specimens 

 captured at Rock Iskind in August. 



18. OrocJiaris uhleri^ n. sp. 



A single specimen in the Museum of the 

 University of Illinois seems so distinct 

 from described species that it deserves 

 a name. It may be described as fol- 

 lows : 



Female. Length, .40 in. ; post, fern., .36 

 in.; elytra, .32 in.; ovipositor, .32 in. 



Dull brownish yellow with the head, pro- 

 notum and posterior femora very obscurely 

 spotted with fuscous. The body and limbs 

 are pubescent with soft hairs, the color of the 

 body. The pronotum is short, with the an- 

 terior margin sinuate and the posterior con- 

 vex. The elytra do not exceed the abdomen. 

 The venation of the dorsal field is not promi- 



nent and the reticulation is not lozenge-shap- 

 ed. The vein which separates the dorsal 

 from the lateral field is unusually prominent, 

 however, and as a consequence the angle 

 formed by the two fields is very distinct- 

 The mediastinal vein, the uppermost vein of 

 the lateral field, is two-branched. Both fields 

 are triangular, so that the elytra are acute at 

 the apex. The wings are scarcely more than 

 half the length of the elytra. The posterior 

 femora are very long, exceeding the oviposi- 

 tor and almost equalling the body in length. 

 The posterior tibiae are as long as the fem- 

 ora. They are very moderately pilose and are 

 furnished with strong, spreading, acute, 

 brown-tipped spines, seven on the inner and 

 six on the outer margin of the lower face, 

 besides the three at the apex on either side. 

 The lower face of the metatarsus of the poste- 

 rior legs is armed with similar spines, four 

 on the outer and two on the inner margin. 

 These spines increase regularly in size pos- 

 teriorly, and the pair at the apex equal fully 

 half the length of this, the metatarsal, joint. 

 The ovipositor is straight with the apex very 

 acute and armed with distinct though minute 

 teeth. 



This species can be distinguished at 

 a glance from O. saltatrix Uhler by its 

 smaller size, much longer posterior legs, 

 acutely tipped antennae and short wings. 

 In addition to these distinctions, the 

 spines of the posterior legs of uhleri 

 are conspicuously large and strong, 

 while those of saltatrix are weak and 

 inconspicuous. The posterior tibiae 

 are quite densely pilose in the latter 

 species and only very moderately pilose 

 in the former. 



