262 Annals Entomological Society of America [Vol. XIII, 



three species of Dictenidia, least extensive in D. bimaculata, 

 where it is confined, to cell R5, most extensive in D. fasciata 

 where macrotrichiae are found in cells R2, R3, R^ and Mi. 



Pselliophora Osten Sacken. 



Pselliophora ctenophorina Riedel. 



1913. Pselliophora ctenophorina Riedel; Entomol. Mitteilungen, vol. 2, pp. 274-276. 



One male from Taito, Formosa, February 25-March 27, 

 1919 (S. Inamura, J. Sonan and M. Yoshino) No. 1318. 



One female from the type-locality (Koshun), April 25-May 

 25, 1918 (J. Sonan, K. Miyake and M. Yoshino). 



In the male the last segment of the palpus is yellowish white, passing 

 into dark brown at the narrow apex; in the female, however, the terminal 

 palpal segment is entiiely black, the third black with the extreme base 

 and apex pale. In the male, the centers of the wing-cells are but 

 slightly paler than the obscure blackish ground-color; in the female 

 the centers of cells M, R-^, Mi, 2nd M2, Mi, Cu, Cui, 1st A and 2nd A are 

 whitish hyaline. 



Pselliophora scalator sp. n. 



Closely related to P. laprobanes (Walker); thoracic pleura yellow; 

 wings yellow with dark brown markings; abdomen with a daik brown 

 median stripe, the posterior margins of the segments narrowly blackened. 



Male — Length 17 mm.; wing, 15.8 mm. 



Female — Length 20 mm.; wing, 17.5 mm. 



Frontal prolongation of the head very short, yellow; palpi with the 

 basal three segments yellow, the terminal segment dark brown at either 

 end, paler brown medially. Antennae of the male with the first segment 

 obscure yellow, darker above; remaining segments bicolorous, the basal 

 two-thirds of each segment and the pectinations black, the apical third 

 yellow. In the female, the simple antenna is almost uniformly brown 

 throughout. Head yellow, clothed with long, black hairs. 



Pronotum yellow, the sides of the scutum narrowly margined with 

 dark brownish black behind. Mesonotal praescutum yellow, with three 

 conspicuous, dark brown stripes, the lateral stripes continued across 

 the suture and re-appearing as conspicuous marks on the scutal lobes; 

 remainder of the mesonotum yellow, the median areas of both scutellum 

 and postnotum indistinctly darkened. Pleura yellow. Halteres brown- 

 ish yellow, the knobs dark brown on the basal half. Legs with the coxae 

 orange-yellow ; trochanters yellow ; femora brownish yellow, the posterior 

 femora narrowly tipped with black; tibiae brown, the posterior tibiae 

 darker brown, with a broad, pale yellow ring just beyond the base; tarsi 

 dark brown. Wings yellowish, variegated with dark brown; the wing- 

 tip beyond the cord is dark brown, in the male, the centers of cells 



