110 Studies in Kansas Insects. 



Derotmema haydenii Thomas. 

 CE. haydenii Thomas. Rep. U. S. G. S. Terr., vol. 5, 460; 1871 (1872). 



Head and thorax somewhat wrinkled. Vertex rather narrow; central 

 foveola somewhat elongate; margins prominent and sharp; open in front 

 and continuous with the sulcus of the frontal costa; median carina dis- 

 tinct; frontal costa sulcate throughout its length, very narrow above 

 the ocellus; eyes prominent, subglobose. Antennae rather longer than 

 usual. Pronotum tricarinate; median carina distinct but not prominent; 

 lateral carinas distinct only on the posterior lobe; third transverse inci- 

 sion very distinct, nearly straight, cuts the median carina about the 

 middle; the anterior lobes are covered with irregular raised lines, the 

 posterior lobe with elongate tubercles; apex blunt, terminating in a 

 right angle. Elytra and wings passing the abdomen, narrow. Posterior 

 femora slender. 



Color (dried after immersion in alcohol). Dull clay colored, dotted 

 with brown or fuscous. A transverse fuscous stripe in front between the 

 eyes. A smaller fuscous spot about the middle of each side of the 

 pronotum. Upper and lower margins of the elytra marked with small 

 fuscous spots; the middle field nearly clear, a few minute paler dots only 

 being visible. Wings, of the alcoholic specimens, a dull yellow at the 

 base, but when living this portion is red; beyond which a tolerably broad 

 fuscous band crosses, narrowed in front and behind, curving round the 

 posterior margin but not reaching the anal angle; a submarginal ray ex- 

 tends up the front nearly to the base; apex pellucid, with the nerves 

 partly ocherous and partly dusky. Anterior and middle tarsi with two 

 black annulations. Antennas with alternate rings of yellow and fuscous. 

 Color of the living insects, as appears from the short field note made in 

 regard to it, is as follows: Wings red at the base; antennae with alter- 

 nate rings of brown and red; general color ash gray, marked with 

 fuscous dots and spots. 



Dimensions: Female — length, 1 in.; elytra, .87 in.; posterior femora, 

 .54 in.; posterior tibiae, .45 in. Male — length, .62 to .7 in.; elytra, .7 in. 



Found in Colorado and Wyoming. My attention was first called to 

 this species a short distance above Fort Fetterman, on the North Platte, 

 but I afterward found it among my collections made in Colorado. 



This species is apparently restricted to the western part of our state, 

 which would naturally be expected from the distribution as given by 

 Thomas. 



Measurements in Millimeters. 



Body. Tegmina. Post, femora. 



Female 26.0-22.0 24.5-21.0 13.0-10.5 



Male 18.0-14.0 19.0-15.5 10.0- 9.0 



(See fig. 65, page 78.) 



Metator McN. 



Closely allied to Mestobregma Sc. ; in fact, the genus was founded on 

 Mestobregyna pardalina Sauss. Head large; face horizontal; vertex tumid, 

 broad between the eyes; fastigium quadrate, depressed, with very high 

 and abrupt lateral and frontal carina?; lateral foveolae small; eyes small; 

 moderately prominent; antennae long filiform; pronotum posteriorly as 

 broad as the head, somewhat constricted in the middle, posterior border 

 rectangular; median carina of pronotum moderately conspicuous, slightly 

 higher on the front than on the hind lobe, twice deeply cleft; tegmina 

 and wings surpassing abdomen; in tegminal markings resembling the 



