2 2 FAUNA HAWAIIENSIS 



2. Costa of wings strongly tinged with fuscous (2) D. hawaiieiisis, sp. n. 



„ „ clear or only slightly dusky 3. 



3. Abdomen dark steely-blue, si/e larger (j) -O- daripennis, sp. n. 



,, bright metallic-green 4- 



4. Abdominal segments with purplish-black hind margins {4) D. fulgens, sp. n. 



„ „ unicolorous (5) D. affinis, sp. n. 



( I ) Dyscritomyia limbipennis Thomson. 



CatapicepJiala limbipennis Thorns., Eugen. Resa. Dipt. p. 541 (1868). 



This and the five following species appear to constitute a new and distinct genus 

 as described above. 



The following brief description of the male sex may be added to that of Thomson : 

 Face and sides of frons yellowish-silvery. Second segment of abdomen with a pair of 

 macrochaetae before the middle of the dorsum and another pair a little before the hind 

 margin, third with a pair of dorsal and six hind marginal, fourth segment very bristly. 

 First and third pairs of legs with tarsi of peculiar structure, with very small claws and 

 pulvilli, intermediate pair normal. The fore tarsus is about two-thirds of the length of 

 the tibia, the metatarsus as long as the succeeding four joints together and furnished 

 at the base beneath with a peculiar curved and pointed projection, four apical joints 

 gradually decreasing in length and thickness. The hind tarsus about two-thirds of the 

 length of the tibia, but remarkably compact and tapering in appearance, owing to the 

 peculiarly stunted joints successively decreasing in length and thickness. 



H.\B. Oahu, two males from Waianae Mts., 4. 1892, are evidently the species 

 whose female is described by Thomson {/.^.) from Honolulu — at any rate they agree 

 in all the characters which can fairly be assumed to be common to the two sexes. — 

 Molokai, two females labelled " Molokai Mts., 3000 ft., 9. 1893" ^nd "above Kalawao, 

 Molokai, 4. 8. 93," so closely resemble the males just described that they cannot well 

 be separated. The face is silvery-white, however, without the slightest tinge of 

 yellow. 



Plate II. figs. II — 14, male, profile, leg, chaetotaxy. 



(2) Dyscritomyia hazvaiiensis, sp. nov. 



Z- Long. Corp. 7 — 8 mm.; al. 6^ — 7^ mm. Similar in general appearance to 

 D. hmbipennis Thorns., but legs of normal structure, with large claws and pulvilli, face 

 silvery-white, second and third segments of abdomen with two discal and six to eight 

 marginal macrochaetae, wings tinged with fuscous on costal margin but not yellowish at 

 the base, and the alulae purer white. 



?. Like the male, but second segment of abdomen with only two discal and two 



