66 FAUNA HAWAIIENSIS 



(21) Dj-osophila olaae, sp. nov. 



$. Long. corp. 4^ mm. ; al. 4^ mm. Front dark brown, hinder part of orbits 

 and vertical triangle blackish ; face blackish, with a distinct keel, eye-margins and chin 

 light cinereous ; antennae dark brown, second joint for the greater part yellowish. 

 Thorax, including pleurae, scutellam, and metanotum, blackish, halteres reddish-yellow. 

 Abdomen blackish, the segments very narrowly edged with reddish-yellow. Legs 

 with the fore coxae and all the femora blackish-brown, tibiae yellowish, intermediate 

 and hind pairs infuscated at the tip, knees light yellow, tarsi obscure yellowish. Wings 

 slightly tinged with yellowish-brown, posterior transverse vein straight and broadly 

 infuscated, rather less than its length from the border, last two sections of the 4th 

 vein equal. 



Hab. Hawaii, Olaa, one female, December i8g6. 



(22) Drosophila crassifennii-, sp. nov. 



t- Long. Corp. 2)\ nir"- I ^- 4 ""'"''• Front dark brown, an orange-coloured trans- 

 verse spot behind each antenna ; face light yellowish with a very prominent light 

 yellow rounded central keel ; antennae dark brown, base of third and apex of second 

 joints reddish-yellow. Thorax orange-yellow, with five rather indistinct brown stripes, 

 humeri light yellow, pleurae reddish-yellow blotched with dark brown, scutellum 

 blackish-brown with the sides yellow, metanotum reddish-yellow, halteres light yellow. 

 Abdomen dark brown, with the segments indistinctly edged with yellowish. Fore 

 legs with the coxae reddish-yellow, the femora shining dark brown, short and very 

 much swollen, with some long black hairs on their upper and outer surfaces, the tibiae 

 equal in length to the femora and yellowish, the tarsi yellowish with the apical joints 

 somewhat darker ; intermediate and hind legs with the femora shining dark brown 

 but not swollen, the tibiae yellow with two dark rings, and the tarsi slender and 

 yellowish. Wings slightly greyish tinged but none of the veins clouded. 



Hab. Maui, one male of this distinct and peculiar species from Haleakala, 

 5000 ft., October 1896. 



Plate HI. fig. 17, fore leg of t- 



(23) Drosophila Jiasalis, sp. nov. 



$. Long. Corp. 4I mm. ; al. 4 mm. Front dark brown, with the anterior edge, 

 the orbits, vertical triangle, and a central line lighter and more or less yellowish ; 

 face brownish-yellow with a very prominent yellow, nose-like keel ; proboscis yellow. 



