CHARLES W. METZ. 151 



smooth, polished, rounded space — not seen in any other 

 species ". The description is too indefinite to make accu- 

 rate determination possible, and I have never examined any- 

 authentic specimens, so cannot locate it, altho I presume it 

 belongs in the " Cressoni Division." 



Prosopis nelunibonis Rob. 1890. 

 1890. P. nelumbonis, (female), Rob. Tr. Amer. Ent., Soc. 17:318. 

 1904. P. nelumbo7iis, Rob. Can. Ent. 36:273. 



The very brief description of the female differs from that 

 of P. modestus in giving, "head and thorax coarsely punc- 

 tured with coarse, shallow punctures — abdomen with first 

 and base of second segments rufous". It cannot be defi- 

 nitely distinguished by these characters alone. The male 

 has been referred to as also having the basal segment of the 

 abdomen rufous, but to my knowledge it has never been 

 described. 



Prosopis nucleolus Vier. 

 P. nucleolus, (female), Vier. Insects of Beulah, N. M. p. 64. 



I have been unable to identify this from the description of 

 the female. It cannot be recognized until the male is de- 

 scribed. 



Prosopis scliwarzii Ckll. 1896. 

 1896. P. schwarzii, (female), Ckll. Ent. Mag. 32: 218. 

 1898. P. schwarzii, (male), Ckll. Ent. 1898, p. 216. 



This is apparently a distinct species, being large, with 

 coarse thoracic puncturation ; and lacking the supraclypeal 

 mark in the male. A male specimen in Professor Cockerell's 

 collection lacks the supraclypeal mark, has only a yellow 

 blotch on clypeus, and has short lateral marks, confluent 

 with the orbit. It is evidently of the " Modestus Division ", 

 but cannot be located with certainty until the male genitalia 

 are examined. 



Prosopis tliaspii Rob. 1898. 

 1898. P. ihaspii, Rob. Tr. Ac. Sc. St. Louis. 8: 43. 

 1904. P. //m5/>n, Rob. Can. Ent. 36:273. 



Both sexes of this species are characterized by having a 

 lateral tooth on front coxa, according to the description. 



TRANS. AM. ENT. SOC, XXXVII. 



