FAM. EMPIDID/E 19 
Hendel would overthrow the classic name Zyóos in favor of the doubtful name Noeza, and in 
this course unfortunately he has been followed by Kertész, Bezzi and Coquillett. This opens up 
the question of the general acceptance of the abandoned names of Meigen's 180o paper, which; have 
been contested by many zoologists. As in this early paper Meigen mentioned no species by name, 
thus disregarding binonial nomenclature, as identification through his brief and broadly applicable des- 
criptions is uncertain, and as it is impossible to determine the genotypes from the data in this paper 
alone, it appears that nothing is to be gained by resurrecting the names of 1800 but much is to be 
lost by the wholesale replacement of scores of generic names in common usage by names of questiona- 
ble application. An extended discussion to this effect has already been penned by the writer (see, 
Melander : Psyche, Vol. 17, p. 41-47(1910). Itis unfortunate that when the International Commis- 
sion on Zoological Nomenclature had this specific case under consideration it decided in Opinion 28 
(Smithsonian Publication 1989, p. 66, Oct. 1910) only that Meigen's 1800 paper had actually been 
published. However, in Opinion 46, regarding the status of genera for which no species was distinctly 
named in the originàl publication, the Commission has rendered its opinion that a genus becomes a 
genus. dubium. when it is impossible to recognize any one of the original species for the genotype from 
the original description. It is better to let these questionable genera remain doubtful than to attempt 
at this late date to fix their genotypes, with the consequent overthrow of well known names of such 
dominant genera as Rhamfhomyia, Platypalpus, Hybos and Clinocera. Therefore throughout this fascicle 
Meigen's « Erstlingsarbeit » will not be seriously considered. 
The species of Hybos are zstival, but occur among the shrubbery of woods. There are relatively 
but few species, one only in the United States and three in Europe. 
TABLE OF THE NEW WORLD SPECIES OF HYBOS 
I. Costa nearly straight, if bowed the costal cell.is broadened, 
MoODOSSDDUBES cur cc redeas iu in du a eL eq eU uu cui. 
Costa rounded, parallel with first vein and bearing strong cur- 
vedsbiDes u.c uu. uot. I NOSU 24-49 1 HL SPINICOSTA, Wheeler& Melander. 
2. Front metatarsi longer than or nearly as long as their tibize, 
hind femora not spinose, hind metatarsi not spinulose, mid- 
de DDO WIN YCDOIDRE SEEOI- c nau LU MC NM DOE LCS I uei 
Front metatarsi evidently shorter than their tibize, hind femora 
with spines, hind metatarsi with small black thorns below 
(as far as known). 
m 
3. Coxe and legs wholly yellowish ; third antennal joint elongate 
oval; nodorsocentrals. . . . . . . . . . . . . H.XANTHOPODUS, nov. sp. 
Coxz and legs almost wholly black; two dorsocentrals. . . . . . . . . . . . . . 4. 
4. Two intermediate flexor sete on middle tibize; third antennal 
joint subulate; halteres whitish. . . . . . . . . . H. tvPicus, Wheeler & Melander. 
One flexor seta at middle of middle tibiz; third antennal joint 
OVBIGOGRINIOSDIGEOHS i um ue ue Ri e rere oe C IISECTORUS, floV, Sp. 
Un 
| Ihorax sore orless dusted; eyes separated on theface. . . . . . . 4... . . « «6. 
Thorax shining; eyes contiguous or subcontiguous below 
DINEM Uu Mu LM MEE LLUVIA IYTI 
6. Halteres whitish; dorsocentrals present. . . . m puSUE AME UNE DIRE P 
Halteres blackish; base of hind tibi& yellowish; no Modi 
ceguals "cde ca X qvas. ss: H.LURIDUS, Bezel. 
