E. T. CUESSON, JK. 
:VM 
Dcscriiifion. — cf, 9 . ])};iok; middle tarsi, liiiid lihiae and 
tarsi, yellow; halt.ores and fore tarsi, except l)ases, white; third antennal 
joint brown; wings with a large discal and a broad apical infiiseat ion (tig. 10). 
Entirely polished, but mesonotuin, scutellnm, and abdonam above, ob.^eured 
by close grantilation, although the abdomen is less s(.. 
Structurally similar to cc/dru/i.s w'ith exceptions, brons (|uadrate, surface 
somewhat relieved on the triangle. Face more s])h('rically convex, wit hout anv 
median tuberculous swelling. Sciitellum more triangular with ai)ical bristles 
weakly tuberculate. Abdomen elongate; lateral maigins revolute and the 
ventral lobes not oppressed to venter, leaving the venter broailly sunken. 
Fore femora with fle.xor series of distinct spines which regularly diminish in 
length distally. Length. — 2 mm. 
— cf ; Dt'itafl iiioiil of M;ig;(lal<‘ii;i, ( 'oloinbui, 
Ft'Lruary 1!)12, (Ujlielyi), [Iliiiig:. Ntil. Mtis.]. 
"riiive topotypes, aiul additional .spt'cinu'ns IVoin Alajuoht, 
Pa.nania, Alarcli 12, (A. Biisek), [U. 8. N. M.J, lia\'(' Ix'on ex- 
aiiiined. 
Oehtheroidea atra W'illislon (Plate XX, ligitres M, II, and 12.) 
ISOt). Oclithci'didcd dli'd Williston, 'Trans. Tint. Soe. London, iN'.ld, 101, pi. 
XIII, figs. Mb, l-ltia. 
ddii.s is th(' most rolmst s])(‘ci('s in the g;(‘nus. It nitty he eon- 
sideretl tyitieal of a si'oup, including; siinllis, in which the facitd 
sculitturing; is in the form of transverse g;i-oov(\s, wliilt* tin' jiils 
tilong: the parafaeial groove aiiptair as a longitudinal, suhoptupie 
line. It may readily be distingtiished from siinilix by tin' frons 
tiiid face being more deeply seuljttured, not smooth; tin' mesono- 
tum and seutellum opatpie, tin' latter broad with llu' tpiietd 
margin truncate. This is another s])eeies tlitit suggt'sts affinity 
with (fijmnopa in many res])eets. 
d’he specimens in the matt'rial stndit'tl tigrt'c in ('\’('ry respeel 
with the pai’atypt's in tlu' Amerietin Must'tim ol Xaturtd History, 
ddu' original dt'seription sfalt's thtit thert' wert' (weh'c males 
in the typietil series. This nitty bt' tin ('rror, t'ttsily iiittde in 
this group unless one is very etirt'iul in I In' (h'li'rmintd ion of sex 
Dcscriptioti. — cf, 9. Black; middle and hind tibiae tiiid their ttirsi. e\ce|)t 
apically, yellowish or whitish; halteres and two Itasal joints of fore tarsi, 
white; wings yellow, with a more intcnsi' cloud at apex (hg- 1 • HI bristles 
and hairs small and minute. 
Kyes noticeably obliciucly ovid. Frm s marly tis broad as long, shmma 
and .sculptured with rugae and pits on the triangle; bristles weak, the trontal 
and orbital not di.scermble. Face, in profile, moderately snb-conically gibbos,- 
TR.XXS. .UI. EXT. .soe., XLVII. 
