484 Mr. Cameron's descriptions ofneiv 



situated in a hollow, Clypeus truncated at apex. Wings hyaline ; 

 stigma and costa livid testaceous. The transverse radial nervnre 

 is received in the apical thu'd of the cellule ; the 2nd cubital 

 cellule is a very little longer than 3rd ; the transverse median ner- 

 vure is received near the middle ; the 2nd reciUTent in basal fourth 

 of the 3rd cubital cellule. The coxae and trochanters are paler than 

 the rest of the legs . Claws bifid. Male. Length, 9 mm. 



A very distinct species. I have named it after Gustos 

 Eogeuhofer, of the Vienna Museum. 



Hah. Orizaba, Mexico (Bilimik) ; Mus. Vienna. 



Strongylogasterfiimipennis, n. s. 



Black ; apex of clypeus, labrum, and a thin line on pronotum 

 obscure white ; anterior tibiae and tarsi fuscous in front. Wings 

 smoky ; nervm-es and stigma black. Antennae longer than the 

 head and thorax together, not much thickened beyond the middle. 

 Frontal area clearly defined, enclosing the lower ocellus ; the apex 

 rounded, the base projecting and narrowed between the two hind 

 ocelli ; the apex dilated, and from its sides a carina nins to the 

 eyes. Clypeus transverse ; 3rd cubital cellule distinctly longer 

 than 2nd, the apex not very much dilated ; 1st radial cellule much 

 longer than 2nd ; transverse basal nervure received past the middle 

 ot the cellule. Male. Length, 10 mm. 



Closely allied to S. nigrcdo, Norton, but is larger, and 

 differs otherwise in having the antennae longer and not 

 so much thickened at the apical half, in the mouth and 

 a line on the pronotum being white, and in the 3rd 

 cubital cellule being much longer than the 3rd ; the 1st 

 radial cellule being also longer compared to the 2nd, 

 this not being the case with nigredo. 



Hah. Mexico. 



Ptilia crassida n. s. 



Black, shining ; labioim and mandibles piceous ; pronotum 

 broadly, tegulae, tibiae, and tarsi, white ; the apex of hind tibiae 

 broadly, and hind tarsi, except at the base, black. Antennae 

 piceous, not much longer than the thorax ; covered with a micro- 

 scopic pile. Sutiu-es on vextex broad and deep in fi-ont of the 

 ocelli ; fi-ont ocelh in a deep round pit. Front bluntly keeled be- 

 tween the antennae. Wings clear hyaline ; costa and stigma 

 griseous-testaceous. The first three cubital cellules are together 

 not much longer than the 4th ; the 3rd is mixch broader than long ; 



