Vol. Xxi] ENTOMOLOGICAL NEWS. 273 



Hab. Claremont, California (Baker); also mountains near 

 Claremont (Baker). The following table separates a series of 

 females of medium size (about 11 mm. or over), of a deep 

 blue or purplish color, with the hair either all black or black 

 with a slight admixture, easily overlooked, of light. 



Clypeus longitudinally concave, the greatest part smooth, shining and 



impunctate ; legs not metallic 0. quadriceps Cress. 



Clypeus normal r 



1. Legs at least partly metallic 2 



Legs black, not metallic 



2. Punctures of mesothorax strong, large, separate.. 0. ribifloris Ckll. 

 Punctures of mesothrax small, extremely dense.. 0. gabrielis Ckll. 



3. First abdominal segment with some pale hair; punctures of meso- 



thorax not confluent 0. atrocyanea Ckll. 



First abdominal segment without any pale hair 4 



4. Clypeus shining, with large well separated punctures; thorax above 



wholly without light hair 0. nassa Ckll. 



Clypeus granular from minute dense punctures 5 



5. Mandibles tridentate 0. casta Ckll. 



Mandibles quadridentate 6 



6. Abdomen deep purple, dullish 0. cara Ckll. 



Abdomen rather steel-blue, shining 0. pntata Ckll. 



These are all species of the Pacific Coast region except O. ribifloris, 

 which comes from New Mexico. 



WE ARE very glad to be able to state that Dr. Philip P. Calvert, Asso- 

 ciate Editor of this journal, is safe. Dr. Calvert and Mrs. Calvert have 

 been nearly a year in Costa Rica, where Dr. Calvert has been studying 

 the Odonata of that country. Cartago, where the Doctor made his head- 

 quarters, was destroyed by an earthquake on May 4th and over a thou- 

 sand lives were lost. 



SEVENTH ANNUAL SESSION. The Puget Sound Marine Station, 

 Friday Harbor, Washington, June j8th to August 8th, under the 

 direction of Prof. Trevor Kincaid, University of Washington. This is 

 a region unsurpassed for the study of marine life. There will hi- 

 courses in Zoology and Botany by competent professors. The station 

 is located in the midst of the picturesque group of islands known as 

 the San Juan Archipelago, in the northern part of Puget Sound. The 

 total expense for board and tuition for the six weeks will be fifty dol- 

 lars. 



"Go to the ant, thou sluggard." quoted the Wise Guy. "I don't have 

 to," retorted the Simple Mug; 4 'all I have to do is to go to a picnic 

 and the ant will come to me." 



