The Sbhegoidea of Nebraska 57 
Tachytes crassus Patton. 
1880. Tachytes crassus Patton, Proceedings of the Boston Society of 
Natural History, xx, p. 393. 
1892. Tachytes crassus Fox, Transactions of the American Entomo- 
logical Society, xix, p. 241. 
One female, Lincoln, July. It is possible that I have confused 
the males of this and mandibularis, but I can not refer any of the 
male specimens which I have to this species by means of the de- 
scription, although the male crassus must surely occur within the 
state. Mr. Chas. Robertson considers this to be synonymous with 
distinctus, 2 
Tachytes rufofasciatus Cresson. 
1872. Tachytes rufo-fasciata Cresson, Transactions of the American 
Entomological Society, iv, p. 217. 
1892. Tachytes rufofasciatus Fox, Ibid., xix, p. 247. 
This species is reported from Nebraska by Mr. Fox, but I have 
not been able to refer any of the specimens in the collection to 
that form. 
Genus Tachysphex Kohl 
SYNOPSIS OF THE SPECIES 
eee Nee fay ath ska iatcete Caisis "ale nes aiehode ns ocle eS aie ote la dees eayeree 1 
Rename eT eee tte Fl one as cis oe ema Biacsid Bic ansleen Sham HATE 2b ene! Saye wiapecmeteh meee 7 
1. Space between eyes at top about equal to length of antennal joints 
eratid. so limited = size: smalls 5-5-7, Mii. . ysdkancse vxicere minimus 
1. Space between eyes at top greater than antennal joints 2 and 3 
(WaT 75 NBR nn Iter Ren es PRG CEN CIC CL I CHRO CIO EEE Oh 2 
2. Basal segments at least, or entire abdomen, black.......... 3 
2. Basal segments at least of abdomen reddish............... 6 
3. Apical segments of abdomen bright red................... terminatus 
SAMICAINSeSTNentSwOL aAbGOIMen, T1Ot Teds seis) cr ayere2 = sue sce @ ole lepers 4 
4, Metanotum smooth or indistinctly sculptured........ punctifrons 
we Metanonii~: coarsely Ssculpttireds - cia.. 02s- 4 score a peet 5 
5. Space between eyes at top decidedly less than the length of an- 
tennal joints 2-4 united, but little greater than joints 2 and 
CMe 507 ho iis ci tee ko Maes ard see Lae eee eee mundus 
5. Space between eyes at top equal to the length of antennal joints 
AM LANILE Clmy ae sotey ss crctial ate mere nin eicetua sR atl cuicioe eee Pere acutus 
G: Abdemen: eutitely Ted). oa s.cesin iva vistas dusrae waciieded tarsatus 
6. Apical segments of abdomen black.................. consimilis 
’. Space between eyes at top less than the length of antennal joints 
Pathe a MER ip tote ee AS. cated hail Pe hire ence belfraget 
