OF WASHINGTON. 307 



Phthinolophus, n. gen. 



$ antennae simple, an elliptical thickening at base above with a notch 

 at the outer portion. Fore wing with a broad costal fold on basal half 

 containing a tuft of pale hairs. Wings moderately elongate, costa convex. 

 Fore wings with all the veins from the cell, 4 curved, narrowly separated 

 from 5 at base. Hind wing with veins 3 and 4 stalked, 5 arising close to 

 the base of the stalk, curved; 6 and 7 closely approximate. Thorax 

 smooth, head with a low keeled crest. Palpi porrect, second joint broadly 

 tufted, third bare. In the unset specimens an erect tuft of scales projects 

 triangularly upward above the basal third of inner margin, which is lost 

 in the set specimens. 

 Phthinolophus indentanus, n. sp. 



$ with the costal two-thirds of fore wing dark blackish brown, yellowish 

 and brighter at apex where a row of dark costal strigae are visible/ but a 

 dark band again succeeds, running obliquely from the apex. Inner third 

 light gray, incising the brown at basal and outer thirds; a few brown 

 strigae on inner margin and a double row of two short brown bars in a 

 yellowish field in the position of the ocelloid patch, the inner pair some 

 times forming a distinct brown spot. The tuft seen in the unset speci 

 mens is in the basal projection of the gray area. Hind wing gray. Ex 

 panse, 12 to 14 mm. 



9 lighter colored, the costal two-thirds largely ocherous, streaked with 

 brown, its lower edge marked with dark brown bars in a broken row from 

 below cell to apex. Inner margin gray, incising the ocherous color; 

 ocelloid patch as in the tf, ocherous, cut vertically by gray, but showing 

 three brown bars in two series, the inner series forming a distinct brown 

 spot. Expanse, 14 to 15 mm. 



17 dV, 21 ? 9 ; Palm Beach, Florida (Dyar) ; Fortress Mon 

 roe, Virginia (U. S. Dept. Agriculture) ; Mt.A iry, Pennsylvania, 

 and Anglesea, New Jersey (Laurent); Montclair, N. J. (Kear- 

 fott) : Hastings, Fla. (Kearfott). 



Type. No. 6804, U. S. National Museum. 



Mr. Ashmead exhibited an interesting new genus and species 

 of wasp, described in the following paper : 



MYRMECOSALIUS, A NEW GENUS IN THE CEROPALID^E. 

 By WILLIAM H. ASHMEAD. 



Apterous and subapterous Ceropalidae are rare, there being 

 only three or four species known, so that the species described 

 below, which represents a new genus in the subfamily Pepsince, 

 is of great interest. It was discovered by Dr. William M. 



