ART, 22 LITTLE KNOWN DIPTERA — ALDEICH 15 



Wings subhyaline, bend of fourth vein slightly angular, the tip of 

 the vein a moderate distance before the apex of ^the wing; third vein 

 with tliree or four small hairs at base. 



Legs black, slender, but not elongate; the claws and pulvilli small; 

 middle tibia with one or two bristles on the outer front side; hind 

 tibia with short and rather appressed ciliation on outer hind side. 



Female. — Front 0.33 of the head width. Antennae considerably 

 larger than in the male. Middle tibia with an even row of five 

 bristles on the outer front side. 



Length, male 11 mm., female 12 mm. 



Described from five males and one female; three males, including 

 the type, were collected at Friday Harbor, Washington, by the 

 writer on July 6 and 17, 1905; one male from the California Acad- 

 emy of Sciences, was collected by E. C. Van Dyke in Paradise 

 Valley, Mount Rainier, Washington, July 25, 1920; one male, El^erts, 

 B. C, June 19, 1914 (B. H. Chrystal, in Canadian National Collec- 

 tion) ; the female (allotype) was collected at Hood River, Oregon, by 

 LcRoy Childs on August 1, 1917. 



Type.— Cut. No. 28899, U.S.N.M. 



This species appears to vary remarkably in the number of the 

 bristles on the outer front side of the middle tibia as well as in the 

 anterior bristles of the sternopleura. One male has none of the 

 latter, while the female has a group of three. The specimen from 

 Mount Rainier has a more dense pollen on the abdomen and the 

 bristles on the second segment are depressed. 



MELEDONUS, new genus 



Similar to Phytopsis, but has greatly reduced palpi and a somewhat 

 longer and tliinner proboscis. Head in side view somewhat square, 

 bulging behind the eye and projecting far before it, the face descending 

 almost vertically. Palpi about as long as the third joint of the front 

 tarsus, slightl}^ swollen and entirely bare. Proboscis when folded up 

 projecting forward out of the mouth cavity by the length of the 

 labella. 



Front rather wide in both sexes; the male without orbitals. A 

 single, laro;e, reclinate vertical on each side. The frontals about seven 

 in number, hardly descending below base of the antennae and not at 

 all diverging toward the eye; the uppermost frontal and the ocellar 

 are turned almost exactly toward the side. Parafacials with small 

 but distinct scattered hairs. Eyes bare. Thoracic chaetotaxy: 

 Acrostichal 0, 1; dorsocentral 3, 3; humeral 2; posthumeral 1; pre- 

 sutm-al 1; notopleural 2; supraalar 3; intraalar 2; postalar 2; scu- 

 tellum with two lateral and a smaller decussate apical pair, no discals; 



