AMERICAN DIPTERA. 231 



HEMERODROMIIN^. 



SYNAMPHOTERA Loew. 



The genus Synamphotera, strictly speaking, has not yet been 

 taken in America. The species described by Dr. Loew, as refer- 

 able to his genus, has been placed in the genus Sciodromia by Mr. 

 Coquillett; but as it is not this form according to Dr. Loew's own 

 statement it is here left as it was originally placed. 



Synamphotera is partly characterized by having the third vein 

 furcate, the third antennal joint small and provided with a very 

 short style, from all of which the following species differs. As Dr. 

 Loew has stated, Synamphotera is intermediate between Hemerodro- 

 mia and Sciodroviia, differing from the former by its slender legs 

 and from the latter in the short incurved proboscis. 



Synamphotera bicolor Loew. 

 Cent., iii, 34. 



Black. Front sparsely cinereo-pollinose. The first two joints of the antennae 

 pale yellowish, the third long, acuminate, black, its terminal seta concolorous, 

 shorter than the third joint. Proboscis somewhat incurved, yellowish; palpi 

 rather long, yellowish. Dorsum of the thorax blackish, faintly cinerascent, with 

 very sparse pollen ; the humeri reddish ; pleurse marked with reddish, sometimes 

 wholly reddish. Scutellar margin in some specimens reddish. Abdomen black. 

 Hypopygium of the male concolorous, swollen, reflexed, the upper lamellae 

 minute, oblong-ovate, yellow. Legs and coxae pale yellow, the very tip of the 

 tarsi darkened. Wings hyaline, the veins luteous, the third vein simple. 3 mm. 



Alaska (Sahlberg). 



The form described as Sciodromia mexicana does not conform 

 with the typical species of that genus, as the front femora are 

 greatly thickened, the eyes separated, the proboscis shorter than the 

 head, etc. In as much as a closely related form is in the collection 

 it is advisable to construct a new genus for the reception of these 

 American species. This genus may be called Litanomyia. 



IvITANOMYlA gen. nov. 

 Small, yellow, slender species. Head flattened, the lower part 

 carried in front. Antennae moderate. Proboscis short, pointed 

 and subincurved. Eyes separated in both sexes, placed forward 

 on the head. Three ocelli present. Occiput with a row of bristles. 

 Thorax more or less cylindrical, shining, feebly pruinose, devoid of 

 acrostichal bristles, but with three dorsal bristles present on each 

 side ; two scutellar bristles present. Abdomen slender, cylindrical, 



TRANS. AM. ENT. SOC, XXVIII. JULY, 1902. 



