J. R. MALLOCH 17 



Frons convex; lower orbital bristle distinctly .smaller than the upper; 

 central divergent setulae distinct, 3-4 in number and as strong as the orbital 

 bristles; antennae lying very close to the eyes, the face distinctly carinate, 

 the anterior margin of it slightly behind the transverse line of the antennae; 

 antennae of moderate size, third joint rounded, not larger than second, 

 pilose; arista geniculated at junction of second and third joints, tapering, 

 pubescent, in length equal to over 1| times the width of frons; cheek 

 about ^ the height of eye, marginal hairs weak, becoming very slightly 

 stronger anteriorly, vibrissa strong, incurved; eyes bare, distinctly higher 

 than long. Mesonotuni with two pairs of dorso-centrals; discal setulae 

 arranged in rows (8-10); post-humeral bristle absent; scutcUum with 4 

 bristles, disk bare; outline of scutellum subtriangular. Abdomen cylin- 

 drical, almost bare, only a few weak hairs on apical segment and hypo- 

 pygium; second segment slightly elongated; hypopygium of moderate size, 

 not projecting much and not recurved. Legs without any conspicuous 

 bristles, those on the mid tibia weak. Wings with costa to distinctly be- 

 yond the end of vein 3, first costal division slightly shorter than second, 

 second about three-fourths as long as third, inner cross vein at below mid- 

 dle of last section of vein 2, outer cross vein at before end of vein 2, and al- 

 most as long as section of vein 4 between the cross veins, last section of vein 

 3 gently arcuate ending slightly in front of wing tip. Length, .5 mm. 



Holotype: — d", Rio Tempisque, Filadelfia, swept over muddy 

 part of beach, January 18, 1910. Type No. G027. 



Leptocera (Limosina) cartagensis new species 



Female. — Brown black, opacjue. Frons viewed from behind with an 

 opaque black M-shaped mark, the spaces between the legs of the latter and 

 beyond, gray pollinose; face shining black; antennae brown-black, third 

 joint yellowish; cheeks brownish yellow. Mesonotum unstriped, opaque 

 brown-black; scutellum and pleura concolorous with disk, sutures and their 

 margins of the latter yellow. Abdomen darker than mesonotum. the 

 posterior margins of segments narrowly yellowi.sh, apical segment shining. 

 Legs brownish yellow, fore coxae, all trochanters and mid femora paler. 

 Wings clear, costal vein thick and black-brown, the other veins brown and 

 not so distinct as costa, veins 4 and 5 very indistinct beyond outer cross 

 vein, the latter only traceable for a short distance beyond that point. Hal- 

 teres yellow, knob brown. 



Frons slightly convex; both orliital bristles directed outward over the 

 eye, the lower one slightly the weaker; orbits without additional hairs; 

 central divergent rows of setulae distinct (3-4), distinctly convergent, the 

 anterior pair weakest; antennae of moderate size, standing well clear of the 

 eyes, third joint rounded and larger than second; bristles on second joint 

 rather weak; arista hair-like, geniculated, pubescent, its length over 1^ 

 times the width of the frons; cheeks at center one-third as high as eye, mar- 

 ginal hairs weak, at slightly anterior to middle there is a strong upcurved 

 bristle which is about as strong as the vibrissa; face .slightly concave, the 



. TRANS. AM. ENT. SOC, XL. (2) 



