52 FAUNA HAWAIIENSIS 



between the tips of the second and third veins and a little broader space between those 

 of the third and fourth veins lighter, a fuscous spot at the termination of the first longi- 

 tudinal vein, all the transverse veins and the apex of the penultimate section of the 

 fourth longitudinal vein also infuscated, the costa strongly curved forward just beyond 

 the termination of the first longitudinal vein, second longitudinal vein strongly and 

 third slightly curved forward about the middle of the wing ; of the transverse veins 

 between the third and fourth longitudinal veins the inner one is just beyond the termi- 

 nation of the first longitudinal vein and the outer one exactly opposite the posterior 

 transverse vein, the latter strongly curved inward towards the base of the wing. 



Hab. Molokai Mts., one male, above 4000 ft., June 1893. 



Plate III. figs. 2, side view of head, 3, antenna, and 4, wing. 



(2) Idiomyia obscuripcs, sp. nov. 



$. Long. corp. 6 mm. ; al. 6^ mm. Head in all respects like that of I. pcrkinsi. 

 Thorax blackish-brown, before the suture two yellowish-cinereous central stripes, humeri 

 and lateral edges yellow, pleurae for the greater part shining blackish, scutellum and 

 halteres as in /. pcrkinsi, metanotum entirely black. Abdomen blackish-brown, shining, 

 without any trace of yellow markings. Legs obscure yellowish, femora blackish with 

 only the apices yellowish, fore tibiae without tufts of hair. Wings like those of /. perkiiisi, 

 but the costa nearly straight. 



Hab. Maui, two females from Haleakala, 5000 ft., April 1894 and May 1896. 



This form is evidently very closely allied to /. pcrkinsi, and may possibly prove to 

 be only the female of that species. On account of the different locality and the difference 

 in the colour of the dorsum of the thorax, the metanotum and the femora, it is perhaps 

 better for the present to regard it as distinct. 



(3) Idiomyia oahuaisis, sp. nov. 



%. Long. Corp. 6 mm. ; al. 7 mm. Front yellow, posterior half of orbits and the 

 vertical triangle black, face and palpi obscure yellowish, proboscis blackish, antennae 

 obscure reddish-yellow with the third joint light brown, second joint with numerous black 

 hairs, arista with long hairs along the whole length above and the apical two-thirds 

 below, also with a number of shorter hairs between the long ones on the upper side. 

 Thorax reddish-yellow with two broad black stripes on the dorsum which are approxi- 

 mated behind and deeply excavated on their outer side so as to appear almost hook- 

 shaped, humeri shining black, pleurae, scutellum, metanotum and halteres as in I. pcrkinsi. 

 Abdomen shining blackish, obscurely yellow at the base, ovipositor and supra-anal process 



