882 
C. H. TYLER TOWNSEND. 
lights; cheeks silvery white posteriorly, more or less hlackish anteriorly ; frontal 
vitta, antennte and arista hlack ; proboscis mostly black, labella brown, hairy; palpi 
light slate color; occiput cinereous, gray hairy, with fringe of hlack bristles on or- 
bital margins. Thorax and scutelliim bristly, sparsely hairy, silvery white, with 
broad, median, uninterrupted black vittie reaching to apex of scutellum ; humeri 
two and pleurte silvery. Abdomen deep orange-red, bases of second to fourth 
segments rather narrowly silvery white ]iollinose, the whole covered with short, 
appressed black bristles; first and second segments with only a median pair of 
macrochaetse ; third and fourth segments each with eight erect macrochaetae, and 
some shorter macrochaeta-like bristles on the concolorous venter. Legs black, 
black hairy, silvery and bristly except tarsi and front tibiae; claws and pulvilii 
not elongate. Wings obscure grayish hyaline, costal border and borders of veins 
fuscous; tegulae pure white, halteres fuscous or brownish. Length 7.5 — 8.5 mm. ; 
of wing 6 — 6.5 mm. 
Described from two specimens taken July 20th. Las Caaices, X. 
Mex. This is a beautiful and striking species. Although the frontal 
bristles do not descend on the face and the arista is short feathered, 
this species seems to claim close I’elationship with Atrophopoda. The 
front claws and pulvilii in both are minute, and the general facies is 
strikingly the same. It is possible that a greater amount of mate- 
rial in this sub-group may demonstrate the affinities of one or both 
genera with the Dexiidse. 
Genus Arthrochceta Br. and Bgst., Zweifl. kais. Mus. W. iv, 134. 
This genus is not sufficiently characterized to stand. It is prefixed 
to a species called by the authors A. demoticoides, from Columbia, 
the short specific characterization of which at the end of the woi’k 
throws no light on the matter. 
Note on the Dexiid genus Uromijia Rob.-Desv. — The writer has 
published a note on this genus (Proc. Ent. Soc. Washington, ii, 100) 
calling attention to the fact that the name was first employed by 
Robinean-Desvoidy, and afterwards applied by IMeigen, or a name 
so nearly like it as to be misleading and confusing, to a Phaniid. In 
order to avoid confusion in the use of the word, I ])ropose for Meigen’s 
genus the name Neouromyia. 
Note on the Dexiid genus Tropidoniyia Br. and Bgst. — Brauer 
and V. Bergenstamm (Zweifl. kais. INIus. W. iv, 119, 1889), have 
erected a genus which they called Trop>idomyia, for a Dexiid from 
Syria. The name is preoccupied; Dr. Williston applied it to a 
South American Conopid, which he described in “Can. Ent.,” Jan- 
uary, 1888. Brauer’s genus must, therefore, be given another name, 
and I propose that of Neotropidomyia. 
