ALLOTRIA MEGAPTERA. 239 



6 (7) Lower part of pleurae piceous-red ; legs rufo-testaceous ; radial 



cellule one-half longer than wide. Ruficeps. 



7 (6) Pleurae rufous, the centre broadly blackish, legs yellow; 



radial cellule large, twice longer than wide. Ruficollis. 



8 (3) Thorax, head, and basal half of abdomen castaneous ; legs 



testaceous ; radial cellule elongate, three times longer than 

 wide. Collina. 



9 (1) Thorax black. 



10 (15) Head red. 



11 (12) Antennae unicolorous yellow ; legs clear yellow. 



Flavicomis. 



12 (11) Antennae fuscous, yellow at the base. 



13 (14) Head entirely red ; radial cellule elongate. Victrix. 



14 (13) Head with the vertex castaneous ; radial cellule moderate. 



TscheM. 



15 (10) Head for the greater part black (entirely or with the oral 



region piceous-red). 



16 (19) Legs clear yellow. 



17 (18) Radial cellule large, elongate, more than twice longer than 



wide, the femora slightly infuscated. Circumscripta. 



18 (17) Radial cellule small, not twice longer than wide; femora clear 



yellow. Minuta. 



19 (16) Legs more or less fuscous-testaceous. 



20 (26) Radial cellule elongate ; the second abscissa of radius at least 



one-half longer than the first. Head piceous-red; radial 

 cellule wide, the basal abscissa of radius a little more than 

 half the length of the second. Curvicornis. 



21 (24) Head black, radial cellule elongate, basal abscissa of radius 



more than half the length of the apical. 



22 (23) Length scarcely 1 mm. ; basal joints of antennae clear yellow. 



Dolichocera. 



23 (22) Length over 1 mm. ; basal joints of antennae fuscous or black. 



24 (21) Head piceous, black on top ; the fourth and fifth joints of 



antennae deeply curved. $. Ancylocera. 



25 (26) Head black ; the fourth and fifth joints of antennae but slightly 



curved. Longicornis. 



26 (25) Radial cellule minute, not much longer than wide ; the apical 



abscissa of radius curved. Mullensis. 



1. ALLOTEIA MEGAPTERA. 

 PI. XV, fig. 7. 



Allotria melanog aster, Cam., Fauna, pt. 2, p. 86, non Htg., Gir. 



Reddish -testaceous, the face yellow, the antennae testaceous, the legs 

 yellow; abdomen black, the base reddish, the apex fuscous; wings 

 large, hyaline, the nervures pallid yellow. Antennae longer than the 

 body, the third to fifth joints very slightly curved, the third and fourth 

 subequal. Radial cellule moderately large, about double longer than 

 wide; the first abscissa of radius three-fourths of the length of the 

 second. Pubescence on median segment and base of abdomen sparse. 



