58 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. xx. 



plate of male triangular with, roundly acute apex, about as long as 

 broad, the margins straight and upturned, leaving between them and 

 the basal U-shaped elevated ridge a broad deep sulcus, on which is 

 further impressed a slight median longitudinal sulcus from the extrem- 

 ity of the basal ridge; furcula consisting of a pair of slight subtriau- 

 gular projections overlying the two bases of the basal ridge; cerci sim- 

 ple, subconical, scarcely so long as the supraanal plate, tapering but 

 little and that wholly in the basal half, the apex rather blunt, rounded, 

 gently incurved; infracercal plates inconspicuous, shorter than the 

 supraanal plate. 



Length of body, male, 17 mm., female, 20 mm.; antennae, male, 7.4 

 mm., female, 8 mm.; tegmina, male, 13.3 mm., female, 19.2 mm.; hind 

 femora, male. 9.75 mm., female, 14.75 mm. 



Twenty-four males, 40 females. Sidney, Cheyenne County, Nebraska, 

 August, L. Brunei* ; Lakin, Kearny County, Kansas, 3,000 feet, Septem- 

 ber 1; Colorado, 5,500 feet, Morrison (S. Henshaw; U.S.N.M. Riley 

 collection); Custer County, Colorado, Cockerell (U.S.N.M.); Plains of 

 southern Colorado, July 25, F. H. Snow (University of Kansas) ; Chaves, 

 New Mexico, September 6; Dallas, Texas, Boll; San Antonio, Bexar 

 County, Texas (U.S.N.M. Riley collection); Carrizo Springs, Dimmit 

 County, Texas, A. Wadgymar, June (L. Bruner); Fort Grant, Graham 

 County, Arizona (U.S.N.M. Riley collection); Tighes, San Diego 

 County, California, Palmer; Siskiyou County, California (U.S.N.M.); 

 Montague, Siskiyou County, California (L. Bruner). 



The species was originally described from Colorado, Wyoming, and 

 Kansas, and has since been reported from [New Jersey] (Uhler), [Min- 

 nesota] and Iowa (Bruner), Nebraska (Thomas, Bruuer), Kansas and 

 Colorado (Bruner), Beaver Brook and the Grand Canyon of the Arkan- 

 sas (Uhler); Texas [and Mexico] (Uhler); [Utah] (Bruner), and San 

 Joaquin Valley, California (Coquillet). Localities which are in doubt 

 or in error are placed in brackets. 



This species closely resembles H. festivus, but while generally of a 

 little larger size is distinguished from it by the black-marked sulci of 

 the pronoturn, the generally but not invariably greater irregularity of 

 the markings of the lateral lobes of the pronotum, the red aimulation 

 of the hind femora (though this will probably be found in some individ- 

 uals of H.festimis) and the ground color of the head and pronotum, as 

 well as in slight differences in the abdominal appendages of the male. 

 The eyes are slightly more elongate in H. festivus than in the present 

 species, at least in the female. 



It is wholly uncertain to what species belongs the reference by 

 Thomas 1 to an insect with tegmina only one-third the length of the 

 abdomen, taken in northern New Mexico or Colorado. I have placed 

 it here with a query. 



I possess a couple of females, collected by II. Rid g way in Ruby 



'Ann. Rep. Chief Eng., 1878, 1845. 



