— ee a ae oe 
New Species of Sphecoidea II 
Subfamily Trypoxyloninae 
Trypoxylon arizonense Fox. 
1891. Trypoxylon arizonense Fox, Trans. Amer. Ent. Soc., XVIII, p. 
145 &. 
d. Similar to the female; differs as follows: in size slightly smaller, 
clypeus and frons up to the emargination of the eyes covered with dense, 
bright-golden pubescence; clypeus broadly incurved medially with a tooth 
in the middle of the incurvation (very similar to the clypeus of spinosum) ; 
propodeum above transversely striate as in the female; posterior tro- 
chanters with a strong spine apically; legs entirely black. 
Allotype, a male collected at Riverton, California, August 6, 
1916. Collected at the same time and place as a female specimen 
of arigonense. 
Subfamily Larrinae 
Larropsis yatesi sp. nov. 
6. Length 7 mm. Head black; clypeus rounded, finely punctured; 
frons, vertex and occiput with close, moderate punctures; space between 
the eyes at the vertex three to four times as great as the length of second 
and third antennal joints; first joint of flagellum about half as long as 
second. Thorax black; mesonotum, scutellum, prepectus and mesepi- 
sterna finely punctured; metanotum granulate; propodeum above with a 
shallow, foveolate, longitudinal sulcus; basal margin of propodeum fo- 
veolate; remainder of propodeum above finely rugose; sides of propo- 
deum rugoso-punctate. Abdomen black, with a sparse, fine, silvery pile; 
finely sparsely punctate. Legs black; all the tibiae feebly spinose. Wings 
hyaline; tegulae and venation of wings testaceous. 
2. Unknown. 
Type, a male collected at Mitchell, Nebraska, August 2, 1917 
(E. J. Yates),-on Melilotus alba. 
Related to minor from which it differs in the relative lengths of 
the first two joints of the flagellum and sculpture of the pro- 
podeum. 
Larropsis rubens sp. nov. 
2. Length 7.5 mm. Head black; clypeus very slightly emarginate me- 
dially, bidentate laterally; apical half of clypeus shining, with large punc- 
tures, basal half finely and closely punctured; frons with moderate 
punctures; ocellar area, occiput and genae very finely punctate; space 
between the eyes at the vertex about equal to antennal joints one and two; 
first joint of flagellum very slightly shorter than the second. Thorax 
black; mesonotum, scutellum, prepectus and mesepisterna very finely and 
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