116 Annals Entomological Society of America [Vol. V,. 
11. Spiracles on large thick conical projections; antenne 18-jointed, length of 
SPECIES ROtO CII dv 2, 2, 0h nee re ee ne eee P. spiraculus. 
Spiracles not exceptionally prominent; yellow-ferruginous species, with 
piceous bands on the abdomen; length 4.5 mm................ P. dispar. 
12. Small species, 2.6 mm., antenne 21-jointed, petiole very short and broad. 
P. pennsylvanicus. 
Manger species, 4mm" .on mores parcel e Aare ee eee eee ee ee 13 
13. Ferruginous with third and following abdominal segments piceous, in 
sharp contrast to the rest of the body; length 4 mm......... P. similis. 
Ferruginous with fourth and following abdominal segments piceous; third 
piceous at base, but broadly ferruginous at apex. Length 5 mm. P. nodosus. 
MALES. 
is .Wings-fullyaidevelopedige w:2'cee oe tease Sey Sel Gee eee ae ee 2 
Fore wings partially developed, hind wings absent....P. flavocinctus Ashm. 
Wings ab Semis ic vie as Ser Sec lege cat ice aie aa ep acta eas eel Re 4 
2), ‘Carinarroughlyssemuicirculany seer a cra ee ne Meee ene 3 
Carina sinuous, abdomen densely pubescent........ P. flavocinctus Ashm. 
3. Piceoferruginous species with the petiole and segments two and three 
TBE OUI Fo) cA etn Se one) oon HE Son rca pe en Tein P. similis 
Piceoferruginous species with well defined apical yellow bands on the 
petiolevandysecondsabdonunaliseamenitzee eae een eee P. dispar 
4. (Pubescencet demse ry okies ssscic eestate mie cole Rone eee Ie eco a en 5 
IPUBESCENCE SPaTSE= were any ere ares aera OCS eae Bee ee Oe 7 
om (Carina=complete;;SimOuUSter irs s2-ccwitereoen ryote te cea aneT One Oe a ee 6- 
Carina incomplete, antenne about 22-jointed.............. P. nigrofuscus 
6. Antenne about 29-jointed, fuscous species though abdominal segments 
often with narrow yellow apical bands.................. P. flavocinctus. 
Antenne about 27-jointed, head thorax and petiole ferruginous, remainder 
Of vabdomen black. - Gp caysetic: bonis Poe eee tote ee ee eee P. manni. 
7. Piceous black species with golden yellow legs.................... P. auripes 
Ferruginous species with a partially piceous abdomen.................. 
P. ottawaensis Harrington 
Sus GENus Micromeson. 
FEMALES. 
1. Clear ferruginous species with piceous abdominal bandings. Face some- 
what sunken between the eyes. Length 6-6.5 mm.......... P. annulatus 
2. Fuscous species with piceous abdominal bandings. Face level with the 
éyes, “length 6-65) <mmite eae oot eee ce ce P. lymensis 
oa. Pale honey yellow ‘species, lengthe4 ints a eae P. texanus Cress 
Thaumatotypus spinulatus, sp. nov. 
Female. Length4 mm. _ Piceous black with very stout fuscous legs 
and antenne. Entirely clothed with rather sparse, long outstanding 
hairs. Petiole very long. Ovipositor stout. 
Head from above transverse, this is due to its marked shallowness 
as it 1s but little wider than the thorax, rectangular, the margined vertex 
being slightly excavated; deep black and rather coarsely shagreened. 
Face rather long, greatly swollen below the antennz so that this portion 
projects beyond the eyes. Malar line indistinct, half as long as the 
width of the face at the lower corners of the eyes. Eyes small, about as 
long as the malar line, internal margins converging above. Clypeus 
transverse with a rather large deep fovea on either side. Mandibles 
testaceous, apparently bifid, teeth black. Antennz short and very 
stout, 16-jointed, as long as the head and thorax together, rather densely 
clothed with a short pubescence. 
