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UNITED STATES NATIONAL MUSEUM BULLETIN 224 



apex, much wider and cylindrical on the basal two-fifths. 

 It is extended forward well beyond the face but not to 

 the end of the niystax. Palpus of two segments, the 

 basal segment small, the second segment a little swollen 

 in the middle with attenuate apex and bearing fine, 

 bristly hairs. The antenna is inserted a little above the 

 middle of the head, very similar in general proportions 

 to those of Psilocurus, which have a short, broad, ovate 

 third segment. The conical microsegment is as long as 

 wide, or a little longer and bears a minute, short, apical 

 bristle. First antennal segment with 2 long, stout and 

 1 short stout ventral bristle; second segment with a 

 rather long, slender, dorsal bristle and 1 additional 

 shorter seta. Upper occiput with 4 long, rather weak 

 bristles and some equally long, stiff hairs. 



Head, anterior aspect: Face below the antenna a 

 fourth of head width and with nearly parallel sides; the 

 surface is densely micropubescent ; the upper half bears 

 20 to 30 suberect hairs as long or very little longer than 

 the first antennal segment. Lower third of face in the 

 middle with a rather compact cluster of 12 moderately 

 stout, pale bristles which extend straight forward, are 

 slightly curved, and are not quite as long as the three 

 antennal segments. 



Thorax: The mesonotum is opaque and pollinose, 

 with moderately abundant, flat appressed setae and 

 without differentiated acrostical or dorsocentral pile 

 or bristles, except for 1 pair of long, stout, conspicuous, 

 dorsocentral bristles placed widely apart a short dis- 

 tance from the scutellum. These bristles are lacking in 

 Macahyia. The notopleuron has 2 stout, long bristles ; 

 the supraalar region has 1 longer, stout bristle; the 

 postalar callosity has a still longer, stout bristle ; and 

 the margin of the scutellum has one pair of long, stout 

 bristles. Humerus with some short, suberect, bristly 

 hairs. Pleuron everywhere pollinose with quite fine, 

 scattered hairs. Disc of scutellum with a few scattered, 

 appressed setae. 



Legs : The femora are all moderately long and rather 

 slender, the hind pair especially so. The hind femur is 

 slightly widened on the outer half, the legs are every- 

 where thinly pollinose and the pile consists of fine, 

 appressed setae. Hind femur with 2 or 3 quite short, 

 bristles ventrally on the basal half, 1 short, weak bristle 

 dorsolaterally near the apex, 2 others dorsomedially 

 close to the apex. Ventrally there is no pile longer than 

 the minute, short setae present elsewhere on this femur. 

 Hind tibia with 3 short, slender, lateral bristles, 4 short., 

 dorsal bristles and 2 posterodorsal bristles, also short. 

 Bristles of the apex unusually long, 7 in number. Tar- 

 sal bristles likewise quite long. Hind basitarsus as long 

 as the next three segments, the third and fourth seg- 

 ments beadlike, fifth segment rather long and with 

 stout, short, lateral bristles similar to Macahyba Car- 

 rera. Middle and anterior femora each with 2 widely 

 spaced, long, slender bristles ventrally on the basal half, 

 1 short, anterodorsal bristle near the apex, another pos- 

 terodorsal closer to the apex. Middle tibia with 4 

 anterodorsal and 4 posterodorsal bristles, these are 

 moderately long and stout and the basal elements are 



shorter ; 6 post ero ventral bristles ; 3 long, ventral ; and 

 2 long, anteroventral bristles. On the anterior tibia the 

 anterodorsal and posterodorsal bristle rows contain 5 

 short bristles each. There are 5 quite short and rather 

 stout posterior bristles and 3 quite long, stout poster- 

 oventral and 3 long, slender ventral bristles. Claws 

 long, slender, gently curved from the base, very sharp, 

 the pulvilli reaching nearly to the apex of the claw but 

 quite slender; empodium long. 



Wings : The wings are hyaline, marginal cell closed 

 with a short stalk, the end of the cell blunt, wide, the 

 second vein joins the first vein at a rectangle. First 

 posterior cell widely open, fourth posterior cell closed 

 and stalked; anterior intercalary vein straight and 

 closes the discal cell rectangularly ; the medial crossvein 

 of nearly the same length and pulled backward. Pos- 

 terior crossvein long; that part of the cubital vein 

 between the fourth posterior cell and the second basal 

 cell quite long. Anal cell closed and stalked, alula 

 prominent. Ambient vein present, except on alula. 



Abdomen: The abdomen with parallel sides and as 

 wide as the mesonotum; pile appressed and setate. 

 First five tergites with prominent, lateral bristles in 

 vertical rows just past the middle of the segment. 

 Each tergite with 3 bristles on each side. Terminalia 

 large and rotate 90°. Epandrium large, rather bowl- 

 like with transverse apex to which is fused the long, 

 conical proctiger, which appears to be in two parts and 

 has the apex acute. Gonopods tightly adjacent to the 

 epandrium, the apex oblique and bearing a row of 5 

 quite stout, spikelike, pale bristles. Ventral cavity 

 largely open, the aedeagus with a single tube enclosed 

 by claspers and pseudoclaspers. 



Distribution: Neotropical: Martinia moloch, new 

 species. 



This genus is named in honor of Dr. Charles H. 

 Martin. 



Martinia moloch, new species 



Characterized by the rather extensive greyish yellow 

 pollen on thorax and posterior part of tergites, and the 

 pale yellow color on the basal half of all the femora. 

 Length 8-11 mm. 



Male. Head : The head is black, the micropubescence 

 and pollen greyish white or very faintly yellowish at 

 most. The bristles in the center of the face are dis- 

 tinctly yellow, the pile above nearly white. Occipital 

 pile distinctly white but the dorsal bristles yellow. 

 Antenna black, with the first two segments sometimes 

 dark brown ; the base of the third segment may be also 

 dark brown. Spikelike ventral bristles of the first seg- 

 ment yellow; dorsal bristles of the second segment 

 black. Proboscis quite black, palpus reddish brown. 



Thorax: The mesonotiun is opaque, with a pair of 

 narrowly separated, brownish black, pollinose stripes 

 down the middle of the mesonotum and with a wider, 

 similarly colored stripe on the outer third of the 

 mesonotum which begins some distance behind the hu- 

 merus and becomes narrowed and attenuate opposite 

 the postalar callosity. This outer stripe is also narrowly 



