178 Psyche [October 
1.’ Scape ‘dilated; larger’ (size .o).2 1.2 a sites he ise ee see eis el ee eee 2. 
Scape notidilated:ismallersizetnnsiece = 2 eee oes oer lees ae eee 4, 
2. Scape broader than long, cordate, concave beneath, the frontal half 
vellow,atubercles darks <7 amin. hye wcrc tek psec aiern tee basalis. 
SeapeJlongermthanbrodd iat. ge. ee ceeitace a sess) syeca she coe eiee ale eee eee 3. 
3. Scape triangular in form with a yellowish white spot in front, the 
upward extensions of lateral face-marks obliquely truncated the 
inner angle prolonged to a point above the insertion of antenne..variifrons. 
(antennata). 
Scape obconical, black, upward extensions of lateral face-marks 
diverging from the eye-orbit, and ending on a smooth, shining, 
rounded space above the insertion of antenne................. verticalis. 
4. Face below sockets of antennze lemon yellow, upward extensions 
of lateral face-marks diverging from eye-orbit and club-shaped 
Orerounded Fat wapex, or scepter hele ee et ole Geieceneie cine cious pygmaea. 
Four separate marks upon face, a subquadrate spot on clypeus, a 
smaller one on supra-clypeal piece, and a stripe on each side, 4-5 
MEET Re es iS RESP SRI APE CPO ES OIE GEE Ee Te cen saniculae. 
5. Scape arcuate, a yellow spot on base of costal nervure and on each 
tegula, upward extensions of lateral face-marks truncate........ ziziae. 
Scape normal, unspotted, base of costal nervure or wing-base 
without a yellow spot, upward extensions of lateral face-marks 
obtuselyjpointed..: sie Sees sacssete escciets ova < slob eo RYe Se rake DOS modesta. 
Prosopis pygmaea Cr. 
1869. Prosopis pygmea Cr. (not Schenck), o, Pr. Bost. Soc. Nat. Hist. 12:272. 
1896. Prosopis pygmea Robt. 9 o, Can. Ent. 28:137. 
1901. Prosopis pygmea Lov. 9 o’, Ent. News, 12:5. 
1907. Prosopis cressoni Ckll. Ann. Mag. Nat. Hist. ser. 7, 20:131. 
Specimens of the female were collected on the garden black- 
berry, June 19-25; Solidago, August 19-September 8; Aralia 
hispida, July 15; of the male on the garden blackberry, June 
19-21; Solidago, August 9-25. A common and widely dis- 
tributed species, reported also from Connecticut, Indiana, Illinois, 
and Colorado. At Falls Church, Va., it has been taken May 
30 on chinquapin, and July 6 on Ceanothus by Dr. Nathan Banks. 
As the European P. pygmea Schenck, according to Dalla Torre, 
is a synonym of P. brevicornis (Nyl.) Schenck, the long established 
specific name given by Cresson has been retained. 
Variations in the yellow marks are common; in the female 
there is usually a spot on each tegula but it may be absent, occa- 
sionally there is a spot on the clypeus, the lateral face-marks may 
be reduced to a stripe or a spot, while in one male the tubercles 
