320 THE CANADIAN ENTOMOLOGIST 



Oviparous female. — Antennse as follows: III, 0.928 mm.; IV. 

 0.512 mm.; V, 0.416 mm.; VI, (0.208 mm.+0.24 mm.). Segment 

 III armed with sensoria as in the apterous viviparous female. 

 Hind tibiae 1.44 mm. long; slightly swollen and armed with a 

 very large number of rather small, indistinct sensoria; hind tarsus 

 0.224 mm.; caudal extremity somewhat drawn out into an ovi- 

 positor though not prominently so. 



Colour as in the apterous viviparous form. 



Described from specimens in balsam mounts. 



Type in U. S. Nat. Museum. 



The two species may be separated by means of the following 

 characters : 



A. Unguis of segment VI considerably shorter than the base and 

 about one-tenth as long as segment III; sensoria on segment 

 III on basal half only ohlongus. 



B. Unguis of segment III about equal to base and about one- 

 fourth as long as segment III; sensoria on segment III in a 

 row covering entire segment americanus. 



HOW EMPHOR DRINKS. 



BY CHARLES ROBERTSON, CARLINVILLE, ILLINOIS. 



The fact that Emphor bombiformis rests upon the water when 

 drinking, mentioned under the above title by Frederick Knab in 

 Proc. Ent. Soc. Washington, Vol. XIII, p. 170, 1911, was ob- 

 seirved in 1890 and was recorded in the Canadian Entomologist, 

 Vol. XXII, p. 217. It is fairly certain that the bees were not 

 drinking in the ordinary sense, but that they consisted exclu- 

 sively of females which were getting water to soften the earth in 

 which they were making excavations for their nests. 



Mailed September 10th, 1918. 



