ART. 23 FLIES OF THE FAMILY SAPROMYZIDAE— MALLOCH 5 



Legs testaceous yellow, a mark on apices of fore femora, another 

 near bases of fore tibiae, and the fore metatarsi except their apices, 

 black, the dilated portion of fore tarsi Avliitish. Wings marked 

 with fuscous as in Figure 2. 



Frons fully twice as long as wide, the surface uniform in texture: 

 ocellars miscroscopic ; cheek almost linear; face concave below an- 

 tennae, the lower half prominently convex (fig. 1) ; third antennal 

 segment about seven times as long as its width at middle. Thorax 

 appearing finely granulose on dorsum, with two or three closely 

 placed series of miscroscopic intradorsocentral hairs, and a series of 

 similar hairs in line with each series of dorsocentrals ; prescutellar 

 acrostichals lacking. Fore femur without bristles or anteroventral 



Figs. 1-2. — 1. Hkad of asilostosia palpalis fp.om sides. 2. Wing op 

 asilostoma palpalis 



comb; tibiae with the preapical dorsal bristle very short except on 

 mid pair. Venation as in Figure 2. 



Length, 5.5 mm. 



One male, Barro Colorado, Panama Canal Zone, July 27, 1923 (R. 

 C. Shannon). 



Type.— C^t. No. 40710, U.S.N.M. 



ASILOSTOMA PAIJ.IPES, new species 



Female. — Head glossy black, antennae testaceous, third segment 

 black except extreme base; aristae and the hairs, except those on 

 basal half on upper side, white; palpi fuscous. Thorax colored as 

 in palpalis, but without black markings. Abdomen brownish black. 

 Legs entirely pale yellow. Wings marked with fuscous as in 

 Figure 3. Halteres yellow. 



Frons a little longer than wide, posterior orbitals about middle of 

 frons, and fully twice as long as anterior pair ; antennae as in palpa- 

 lis; face but slightly concave below antennae, and quite prominently 

 convex below, much as in genotype, the labrum narrow, clieek about as 

 high as width of third antennal segment. (Fig. 4.) Thorax not so 

 long as in palpalis^ the anterior pair of dorsocentral bristles much 



