263 



above with orange. Length of body, lo"^™ ; of antenn.ne, 8.25"™ ; of 

 tegiuina, 8.25""" ; of hind femora, lU'""'. A single male was taken in the 

 Garden of the Gods, Colo., July 13. 



15. Si-yllina dellcatula nov. sp. Fastigiara of vertex moderately broad, 

 with prominent margins, slightly approaching each other in a curve pos- 

 teriorly, acute-angled in front ; lateral foveohe rather large, rhomboidal, 

 closely approximate ; frontal costa with straight sides, regularly diverg- 

 ent, rather deeply sulcate, sparsely punctate, like the rest of the face; 

 cheeks smooth ; antennaj about as long as the head and pronotum to- 

 gether. Pronotum obtuse-angled posteriorly, the me<Uan carina equal, 

 moderately prominent, severed scarcely in advance ot the middle; the 

 lateral lobes with a secondary, blunt, irregular, ruguluse carina, extend- 

 ing from a little above the middle of the front bordt^' to the posterior 

 extremity of the lateral carinas. Color dusky-brown above, ashen or yel- 

 lowish brown below, the front pallid brownish, the cheeks and vertex 

 livid, the latter with a pair of dusky streaks extending backward from 

 the lateral carina of the fastigium. Pronotum enlivened above with a 

 reddish tinge, the lateral lobes more or less marked with blackish abov«, 

 the lower third pale yellowish, with a yellowish longitudinal ruga on the 

 middle of the posterior half. Tegmina surpassing the femora, fuligino- 

 pellucid, flecked with small, quadrate, more or less distinct, blackish spots 

 along the median area, the base of upper area and the veins brown ; 

 wings scarcely shorter than the tegmina, pellucid, with a slight fuligin- 

 ous stigma next the extremity of the front margin, the veins of the 

 upper half of the wing blackish. Hind femora extending much beyond 

 the abdomen, bluish livid, with a basal dash, and an oblique premedian 

 streak of black on the outer side and above, and a slight infuscation 

 along the upper margin ; hind tibite pale reddish, the color fading toward 

 the base ; spines tipped with black. Length of body, 12.5"""; of anten- 

 nae, 5"""^ ; of tegmina, 13™'" ; of hind femora, 8.5™"^. 2 <?, Garden of the 

 Gods, Colo., July 13. 



16. Arplda luieola Scudd. 1 <?', Denver, Colo.; 1 9, Utah. 



17. Arpliia arcia nov. sp. 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 furrow, 

 which marks the same, extending through the frontal costa nearly to 

 the ocellus, expanding and forming an oval loop at the extremity ; 

 lateral foveola3 strongly depressed, narrowing interiorly. Pronotum 

 grayish-brown, the upper surface unusually flat for an Arpliia, rugulose, 

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

 dle, regularly, though but slightly, diminishing in height posteriorly. 

 Tegmina ijrofusely sprinkled with very small grayish-fuscous spots, 

 less abundant apically, where it is pellucid. Wings yellow at the base, 

 l>ellucid to an unusual extent at the tip (nearly one-third of the 

 anteanal field is included in the pellucid area), making the transverse 

 dusky baud narrower than in any species of Ari)liia known to me; 

 the radial shoot toward 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 of the base. Hind femora brownish-yellow 

 externally, with two broad, a little oblique, dusky, transverse bands ; 

 hind tibire pale yellow, with a broad fuscous cloud at the tip and just 

 before the middfe. Length of body, 21'"" ; of anteuuii?, 8.5'"'"; of tegmi- 

 na, 22.5"""; of hind femora, 11.5"""'. 1 ^, Denver, Colo. 



Tbis species is more closely allied to the ju'ecediug than to any de- 

 scribed species, but is smaller and differs from it in the narrowness of 



