10 ENTOMOLOGICAL NEWS. [Jan., '05 



D. parritin. This affords further support to the opinion that 

 all species of Dianthidium make resin nests. 



Exomalopsis verbesinae Ckll. 



Tempe, Arizona, one 9 at flowers of Hctcrothcca , in October 

 (Cockerell). This species is certainly not an Anthophorida ; 

 it is allied to E. solani, but smaller and narrower, with redder 

 tegulae and more brightly-colored antennae. It is new to 

 Arizona. 



Exomalopsis solidaginis Ckll. 



La Cueva, Organ Mountains, New Mexico, about 5300 feet, 

 September 5, at flowers of Lippia u>rightii, 3 (C. H. T. 

 Toivnscnd}. These are a little larger than the type, with the 

 hair averaging paler. It is not impossible that they represent 

 the male of E. solani . 



The three forms of Exomalopsis s. str. found in the United 

 vStates may be separated thus : 



Abdomen thinly but copiously hairy, the bases of the segments not 

 contrasting, nor the hind margins with white bands ; flagellum not 

 brightly colored beneath ; males solidaginis Ckll. 



Abdomen with narrow white marginal hair-bands ; females. . . . . i 

 i. Larger and broader; tegulae piceous solani Ckll. 



Smaller and narrower ; tegulae dark brown or reddish , antenna; more 

 brightly colored verbesiiur Ckll. 



All the others (sides Ckll., coquillctti Ashm., tcxana Friese, 

 bruncti Crawf., coinpactulus Ckll.,) have in the male the light 

 clypeus of the group Anthophorula. 

 Odynerus rufinodus Cresson. 



I took this at Mesilla Park. New Mexico, June 14. The 

 insect is closely allied to O. bellulus Cresson, and has been 

 confused with it. The females of the two are easily separated 

 as follows, the notes on bellulus being derived from Cresson' s 

 type in the U. S. National Museum. 



O. ruji nodus Cr. Second abdominal segment without the 

 lateral yellow spots of bellulus ; post scutellum black ; meso- 

 thorax with a median black line ; front without a yellow mark ; 

 rlvpeus black ; head and thorax larger. New Mexico. 



O. bellulus Cr. Second abdominal segment with a yellow 

 spot on each side; post-scutellum ferruginous; mesothorax 



