ENTOMOLOGICAL NEWS 



[Jan., '15 



the behavior of the males to indicate senescence due to old age. 

 They always seemed active and mated readily, even remaining 

 in copulo, in a number of instances, up to just a few hours 

 before their death. 



In the cages these insects were polygamous and polyandrous, 

 a male mating many times with the same or other females,, and 

 a female mating often with one or many males. 



Table II. 



LENGTH OF 



EACH COITION IN 



HOURS 



7, 10, 6i 



8, 5, 26i, 15, 6, 12 

 4,8,7,15,3, 30i,7i,9i 



10, 1, 13, U, 5, 8, 12 



11, 34, 6, 6, 12 

 25, 6, 6 



TOTAL TIME IN 



HOURS SPENT IN 



COPULA 



23i 



72^ 



84i 



53i 



69 



37 



Table II shows that these females during their lives mated 

 from 3 to 8 times with from i to 3 males which were virgin 

 or had already fertilized other females ; that the duration of 

 each coition varied from i to 34 hours ; and that the total num- 

 ber of hours spent in mating by each female varied from 23^ 

 hours to 84^ hours. In fact, the females mated whenever a 

 male was available. In only one instance was an attempt made 

 to oviposit. In this case the female spent several hours with 

 her ovipositor buried in the earth, but an examination later 

 showed that no eggs were deposited. 



Corrections to Paper on Andean Muscoidea (Dipt.). 



Mr. Walton has called my attention to two errors which have crept 

 into my paper published in Pr. U. S. N. M., Vol. 43 (1912). They are: 



Page 309, Oestrogaster, third line, should read "well developed palpi" 

 instead of "no palpi." The palpi were both so closely appressed to the 

 folds of the proboscis that they entirely escaped my observation at 

 time of making description. 



Page 333, Dejeania andina, sixth line, should read "Dififers in having 

 no black whatever on legs" instead of "no yellow whatever." This was 

 a clerical error, as shown in context. — Charles H. T. Townsend, Bu- 

 reau of Entomology, U. S. Dept. Agric, Washington, D. C. 



