480 



UNITED STATES NATIONAL MUSEUM BULLETIN 22 4 



Genus Ctenodondna Enderlein 



Figures 2508, 2514 



Ctenodontina Enderlein, Zool. Anzeiger, vol. 44, p. 260, 1914. 

 Type of genus : Ctenodontina pectinatipes Enderlein, 1914, 

 by original designation. 



The following is Enderlein 's description in translation : 



Male. Genus of the Asillnae. Arista without pubescence, 

 broadened a little at the end and with a short bristle. Abdomen 

 (male) very slender and small, the sides parallel; genitalia of 

 male moderately thickened ; the anterior branch of the third 

 vein is not connected at its base by any crossvein extending 

 to the second vein ; there is no remnant present of any kind 

 of such a crossvein. The anterior and posterior branches of 

 the third vein diverge apically (at the end). Tarsi not pro- 

 longed. The fusion (base) of anterior and posterior branches 

 of third vein divergent. The stalk of the marginal cell (fusion 

 of first and second veins) somewhat longer than the marginal 

 distance between these combined veins and the end of the an- 

 terior branch of the third vein. Third antennal segment slen- 

 der, spindle-like, without pubescence. Lower face with a moder- 

 ately strong gibbosity ; mystax on this gibbosity consists of 

 rough bristles and fine hair not arranged in longitudinal stripes. 

 Anterior and middle femora very little thickened. Hind femur 

 strongly thickened, on the underside in the middle with a 

 long row of teeth arranged as a dense comb. Hind tibia on 

 the base stongly deflected or crooked. 



Distribution : Neotropical : Ctenodontina pectinatipes 

 Enderlein (1914). 



I have included figures of the wing and hind leg 

 redrawn from Enderlein. The wing venation and the 

 character of the antennal style or arista suggest a re- 

 lationship near that of Lecania Macquart. 



Genus Lecania Macquart 



FiQUEES 308, 741, 1403, 1412, 1604, 2185, 2406, 2409, 2434 



Lecania Macquart. Dipt6res exotiques, vol. 1, pt. 2, p. 131, 1838. 

 Type of genus : Lecania rufipes Macquart, 1838, by present 

 designation, the first of 2 species. 



Lecania has 1 subgenus, Pachychaeta Bigot. 



Large flies, quite similar to Eicherax Bigot but with 

 a short, poorly developed face forming an extremely 

 low, ventral elevation. The style of the antemia is ex- 

 ceptionally long, slender and dilated at the apex. In 

 some species the style apex may be strongly lamellate 

 or leaflike. The hind tibia is more slender than m 

 Eicherax and dilated a little toward the apex. These 

 flies also differ in the broad, short, laterally expanded 

 form of the prominent, club-shaped terminalia. 

 Length 15 to 22 mm. 



Head, lateral aspect : The head of medium length, the 

 occiput almost disappearing below at the angle where 

 the eye becomes recessive, but a little more conspicuous 

 ventrally and also near the upper part of the head. 

 The lower occipital pile is scanty, but more abundant 

 than the few scattered hairs which are found along the 

 middle; bristles are set far back from the eye and there 

 are 3 or 4 rather stout, ventrally directed bristles in the 



middle, followed by a gap and near the upper corner 

 of the eye there are 5 nearly straight, stout bristles and 

 3 to 6 additional pairs on the slopes of the postvertex. 

 The proboscis is of medium size, cylindrical, of nearly 

 uniform diameter but strongly pointed beginning at the 

 subapical crease. Palpus long and slender, with 2 stout, 

 terminal bristles. The antenna is attached near the 

 upper third of the head and rather similar to Eicherax. 

 The first segment of the antenna has nmnerous, stout, 

 distilateral and ventral setae, or bristles and more slen- 

 der elements above. The second segment is beadlike 

 and mucli shorter with short, slender bristles on 3 sides. 

 The third segment is small, long oval, with a long to 

 very long style distally expanded to a varying extent 

 and spine-tipped; in a few species the dilation at the 

 apex is conspicuous and leaf like. 



Head, anterior aspect : The face below antemia is less 

 than a fifth the head width, moderately divergent be- 

 low; the low, ventral, facial eminence arises gradually. 

 Upper portion of the face plane with the eye and 

 pubescent only. Only the lower half of the face has 

 bristles, stout or slender and some shorter, bristly hairs ; 

 both of these elements are continued down the sides of 

 the cheeks. Cheeks prominent, pubescent, deeply con- 

 cave or plane. Front smiken, pollinose, with ocular and 

 subocular row of bristles and the sides slightly di- 

 vergent. The vertex is more greatly narrowed, strongly 

 excavated with nearly vertical sides; the ocellarium is 

 small, with only a pair of very short bristles situated 

 beyond the ocelli. 



Tliorax: The thorax is rather less high than in 

 Eicherax; the mesonotum is pollinose, with scattered, 

 very short setae including the humerus; and pile is 

 absent, except below the postalar ; none above the wing. 

 The lateral complement of bristles is similar to Eich- 

 erax; and the scutelkun is without bristles; the very 

 convex, not impressed rim and surface bears scattered, 

 exceptionally stout, erect setae. Pleuron pollinose, 

 the pile scanty, the pronotum with bristles. Post- 

 mesopleuron and its dorsal surface with either pile 

 or setae. Anterior basalare likewise with pile or setae. 

 Posthypopleuron with only very fine hairs; the meta- 

 pleuron has a vertical row of weak bristles and some 

 pile. Metanotal callosity villose, creased behind, pubes- 

 cent only. M etasternum pilose ; postmetacoxal area en- 

 tirely membranous. Presternum greatly dissociated. 



Legs : All the femora are a little swollen, especially 

 the first four femora ; the hind pair slightly narrowed 

 toward the base; hind tibia is relatively slender, 

 widened distally, with a nearly erect brush of setae, 

 rather than flattened setae. Bristles are prominent, of 

 about the same number as in Eicherax on each femur 

 and tibia. Middle femur with 3 stout, anterior bristles, 

 1 posterior bristle near the base, 1 at the apex and 5 

 equally stout, ventral bristles. Basitarsus compara- 

 tively short, as long as the next 2 segments ; claws rather 

 slender, strongly bent at the apex, a little pointed ; pul- 

 villi and empodium well developed. 



