33G 
STUDIES IN AMERICAN EPIIYDRIDAE (DIPTERA) 
Ochtheroidea centralis Crcsson 
1918. Ochihcroidcd cenlrulia Cressoii, Trans. Am. Ent. Hoc., xi.iv, GO, pi. 
Ill, figs. 13, 14. 
This species reiiresents a group having t he face sul»l-ul)erculate, 
suggesting affinity with Athyroglossa gUibra. It is readily dis- 
tinguished liy the white halteres and all tibiae being black. 
Description . — cf, 9. Black; aiiices of middle and hind tibiae and their 
tarsi, tawny. Two basal joints of fore tarsi, and halteres, white. Wings 
hyaline, with brown veins. Shining to iiolished, with mesonotum, scntelhiin, 
and abdomen, microscopically sculptured and faintly dusted with brown. 
Erons broader than long; areas not differentiatetl. Face one-half as broad 
as vertex; median area tuberculose, or in profile subconically convex; sculp- 
turing limited to a line of ])its along the groves. Clypeus projecting, mostly 
at a sharp angle with the face in jirofile. Cheeks one-half as broad as eye 
height. Antennae situated at center line of head, aiul below that of eyes; 
arista with four to five long hairs above. 
Mesonotal setulae weak, rather scattered, or in close series. Scutellum 
strongly convex; marginal hairs and bristles long. .Abdomen flattened, with 
lateral margins shai']); second to fourth segments broad, subecpial in length, 
or fourth the longest-; fifth short. Legs stout; fore femora with short, sub- 
eiiuaf flexor spines and a longer proximal one. Third costal sect ion hardly 
one-half as long as the second. Length. — 2.5 mm. 
Type . — cf; Turrucares, C'osta E-ica, Deeeinfier 20, 1900, (P. 
P. C’alvert), [A. N. S. P. No. 6136]. 
Maleriol E.rn mined . — 20 sjiccimens. 
Mexico: Tampico, Tamaiilipas, December .5, (F. C. Hishojjp), [U. S. X. M.]. 
Cu«.\: Cerro Cabras near Pinar del Rio, September 11, (F. E. Lutz); 
Cuane, September 24-26, (F. E. Lutz), [A. AI. X”. 11.]. Guantanamo, Feli- 
riiary 10, (H. Skinner). 
Porto Rico: Mayaguez, February 16, (F. E. Lutz; along stream); San 
4'urce, near San Juan, February 12, (F. E. Lutz); [all N. Y. Ac. Sc.j. 
"Costa Rica: .\lajuela, Sejitember 15; Bonnefil Farm, Rio Surubres, October 
20; Filadelfia, January 18; J'urrucares, Decembi'r 20; (all P. P. Calvert). 
(iieomhia: .Aracataca, February, (Ujhelyi), [Hung. X. M.j. 
British Guiana: Bartica, February .5, (R^ -b Crew). 
Ochtheroidea fascipennis Cresson (Plat e XX, figure 10.) 
918. Ochtheroidea fasciiiennis ('resson, 4'r. Am. ]*'nt. Soc., xi.n, (iO. 
'I'liis s])e(*ios may l)u jilaixMl next to centralis, Imf ai)])af(Mif ly is 
not closidy ridatod. If is ri'ailily distiuguisluHl by Ihu inftiscafioii 
of f lip wings. If is more skmdiu’ f han centralis, but f lu' [U’oblo of 
f-lu' faciMs similai". Tlu' abdomen is elougaf i', not- flattened, with 
the lati'ral margins luriK'd under, not shai")), so that the venter 
is deejily sunken in dry s])('eimens. 
