FAMILY v.— CEDIPODIN/E. 143 



Arphia arcta Scudder. 



Head grayish-brown above, yellowish elsewhere, the 

 median carina of vertex broken at the posterior limit of the 

 fastigium by the deeply impressed, arcuate, transverse fur- 

 row, which marks the same, extending through the frontal 

 costa nearly to the ocellus, expanding and forming an oval 

 loop at the extremity; lateral foveolae strongly depressed, 

 narrowing anteriorly. Pronotum grayish-brown, the upper 

 surface unusually flat for an Arpbia, rugulose, the median 

 carina but little elevated, not laterally pinched in the mid- 

 dle, regularly, though but slightly, diminishing in height 

 posteriorly. Tegmina profusely sprinkled with very small 

 gra\ash-fuscous spots, less abundant apically, where it is 

 pellucid. Wings yellow at the base, pellucid to an unusual 

 extent at the tip (nearly one-third of the ante-anal field is 

 included in the pellucid area), making the transverse dusky 

 band narrower than in any other species of Ar/? A/a; the radial 

 shoot towards the base is, however, unusually broad and 

 long, equaling at its origin the entire breadth of that part 

 of the wing, and scarcely stopping short oi the base. Hind 

 lemora brownish-yellow^ externally, wnth two broad, a lit- 

 tle oblique, dusky transverse, bands; hind tibiae pale yellow, 

 with a broad fuscous cloud at the tip and just be!ore the 

 middle. 



Length of body, 21 mm.; of antennae, 5.5 mm; of teg- 

 mina, 22.5 mm.; of hind femora, 11.5 mm. 



Only two individuals of this interesting insect, first de- 

 scribed from the vicinity of Denver, Colorado, were captured 

 in St. Anthony Park, and no others have been seen. 



Still another species occurs in the Park, but seems to be 

 undescribed. 



GENUS Chortophaga Saussure (1884). 



Body compressed, somewhat slim, pundate or fine 

 wrinkled, greenish, sub-glabrous, slightly pubescent. Legs 

 remote, with scattered hairs on their surface. Antennae 

 rather short, and sliglitly flattened. Pronotum acute, 



