ART 18 DIPTEEA OR TWO-WINGED FLIES ALDRICH 9 



Type.—M.2i\Q, Cat. No. 27243, U.S.N.M. 



The nearest related form is LoncJiaea aheiTans Malloch, which 

 is much less hairy, has a narrower front and the third antennal 

 joint almost circular. 



Mr. Rockwood writes that the larvae of this species are found in 

 the stems of the plant just above the ground, often in such numbers 

 that the plants are weakened and fall over by their own weight. 



Family MUSCIDAE 



Genus MESEMBRINA Meigen 



Mesemirina Meigen, Syst. Beschr., vol. 5, p. 10, 1826. 



MESEMBRINA MAGNIFICA, new species 



Female. — Black, the parafacials golden pollinose to the edge of the 

 mouth, sharply dividing behind from the shining black bucca; 

 width of front 0.30 of the headwidth, much less than in 7neridiana^ 

 mystacea^ etc. Antennae slender, the arista yellow nearly to tip, 

 plumose; palpi black. Thorax entirely black, the humeri and a 

 median dorsal stripe reaching the transverse suture are pale yellow, 

 pollinose. The dorsum has only small black hair and a few bristles 

 which are very delicate except those at the margins and behind. 

 Posterior dorsocentrals 2; anterior 1, hairlike, just before the suture. 

 Posterior acrostichals 1 ; anterior none ; humeral 3 ; posthumeral 1, 

 very slender; prescutellar 1; notopleural 3 (the usual hind one 

 doubled on both sides) ; supraalar 4 or 5 (only one large) ; postalar 

 2 (postalar declivity bare) ; sternopleural 2. Calypters deep orange. 

 Abdomen black, first and second segments with black hair, except 

 some reddish at base of first. Third segment covered with golden 

 pile, its ground color tending toward reddish. Fourth segment with 

 longer and more erect golden pile, its ground color distinctly red. 

 Legs black. Wings deep yellow at base, infuscated toward the tip 

 and anal angle. Venation as in inystacea, except that the opening 

 of the first posterior cell is before the extreme apex of the wing. 



Length 18 mm. 



Described from one female specimen in excellent condition, col- 

 lected at Suifu, Szechuen, China, by D. C. Graham. 



Ty/j^.— Female, Cat. No. 27244, U.S.N.M. 



BALIOGLUTUM, new genu3 



Hypopleural bristles wanting; fourth vein curved forward, the 



apical cell at tip slightly more than half as wide as at its widest 



part; third vein with a few distinct hairs below, none above; stem 



of venation not (as in Ghrysomyia, etc.) ciliated behind; facial 



9099—25- 2 



