294 ENTOMOLOGICAL NEWS [Dec., '19 



Monumetha albifrons Kirby. L., 2 9,1 S (one 9 at Astragalus'). 

 T. S., i 9, 2 $. 



Ostnia armaticeps Cress. L., 2, one at Gaillardia. L. P. T., 2 

 (one at Arnica). All the numerous specimens of Osmia taken, rep- 

 resenting eight species, were females. 



Osmia fulgida Cress. T. S., 1 (W . P. C.). 



Osmia megacephala Cress. T. S., 1 at Cirsium. L. P. T., one at 

 Thcrmopsis (W. P. C.). 



Osmia pentstemonis Ckll. H., 1. T. L., 2 at Pcntstcmon 

 stcnoscpalns (W. P. C.). L., 2 (one at Astragalus). 



Osmia longula Cress. L., 2 at Astragalus. 



Osmia wardiana Ckll. L., 1. 



Osmia densa Cress. L., 3 at Astragalus. T. S., 2 at Cirsium. 



Osmia albolateralis Ckll. L., 6 (5 at Astragalus'). 



Anthidium tenuiflorae Ckll. L., 2 9,1 $. 



BoMBIDAE. 



All the specimens taken were workers. 

 Bombus mixtus Cress. B., 1. 



Bombus edwardsii bifarius Cress. T. L., 2 (one at Elefhantclla, 

 W. P. C.). 



Bombus flavifrons Cress. H., 2. 



Total 57 species ; 9 new. The types of the latter are in 

 the writer's collection. 



Variation in Color Pattern of the Dragonfly Gomphus 



crassus (Odonata). 



By E. B. WILLIAMSON, Bluff ton, Indiana. 



"Walsh's remark (Proc. Ent. Soc. Phila. II, p. 239, 1863) that the 

 Illinois species of Gomphus seem to have the appendages of the males 

 'nearly as uniform as a set of castings from the same foundry and 

 the same mould' seems to hold true for these three species, (fraternus. 

 c.vtcrnus, crassus) but his statement as to the specific value of minute 

 differences of coloration and its constancy must evidently be modified 

 in view of the variations above detailed." Calvert, Ent. News, XII, 

 pp. 72 and 73, March, 1901. 



In ENTOMOLOGICAL NEWS, May, 1906, p. 148, I mentioned 

 specimens of Gomphus which were intermediate between 

 crassus and fraternus. At that time I still thought of fraternus 

 as a species with the dorsum of abdominal segment 9 black 

 and of crassus as a species with the dorsum of the same seg- 

 ment with a yellow spot or bar. Moreover, at that lime I did 



