392 PROCEEDINGS OF THE AMERICAN ACADEMY. 



fuscous aud especially with a strongly oblique forward directed median 

 stripe. 



Length of body, ^, 14 mm., 9, 19.5 mm.; antennae, <?, 9.5 mm., 

 $, 10.5 mm.; tegmina, J', 15.5 mm., 9, 20.25 mm.; hind femora, ^, 

 9.5 mm., 9? 12.25 mm. 



45 (J, 34 9- California, in the following localities : San Bernardino, 

 July 16; Colton, July 17; Gabon Pass, July 18 ; San Diego, July 22 ; 

 Coronado, July 24 ; Los Angeles, July 26 ; Rubio Wash, Altadena, 

 July 29, — all the above collected by A. P. Morse ; and Anaheim, 

 Coquillett (Bruner). 



Specimens with blue hind wings come from all the above localities 



except Cahon Pass and Anaheim ; those with yellow hind wings come 



from these two localities, and also from San Diego, San Bernardino and 

 Altadena. 



5. Derotmema haydeni. 



(Edipoda hai/deni Thorn., Ann. Rep. U. S. Geol. Surv. Terr., v. 460-461 (1871). 

 Derotmema haydeni Brun., Ann. liep. Nebr. Bd. Agric, 1896, 132 (1897). 

 Derotmema brunnerianum Sauss., Prodr. (Edip., 155-156 (1884). 



First described by Thomas from Colorado and Wyoming, aud credited 

 by Bruner to the Yellowstone and Nebraska and by Saussure to 

 Colorado. I have specimens before me from Colorado, 5500', Morrison ; 

 Canon City, Col., P. R. Uhler ; Alpine, Tex., June 26, and Sierra Blanca, 

 Tex., A. P. Morse; and have myself taken it at Lakin, Kans., Sept. 1, 

 and in the following localities in Colorado : Cucharas, July 8-9 ; 

 Pueblo, Aug. 31; between Pueblo and Veta Pass, Aug. 27; and 

 Garland, Aug. 28-29. 



The color of the base of the hind wings is sometimes red and some- 

 times citron. Specimens at hand with the latter color come from 

 Cucharas and Garland, Col., and from the two Texan localities; those 

 with red wings from all the localities excepting Sierra Blanca, Tex. 



A yellow-winged female of this species, taken at Garland, was observed 

 in flight to produce from six to ten short sharp clicks in rajiid succession, 

 like the ticking of a watch but much faster. 



(Subgenus Tmetodera.) 



6. Derotmema rileyanum. 



Derotmema rileyanum, Sauss., Prodr. Q^dip., 156 (1884). 



Originally described from Idaho. "Salm Co." is given by Saussure, 

 but there is no such county, and probably Salmon City in Lemhi Co. 



