LOUISIANA CIRCU i, \u No. ;. 



If one attempts to find pupa 1 of horseflies, 

 lie is not usually successful, for it is not certain 

 that they will be found in any particular- place 

 any more than in some other place. On account 

 of the hairs and spines with which they arc 

 clothed, the soil sticks to them more or less, 

 causing them to have the same general color as 

 the ground in which they occur, so that they are 

 very easily overlooked. 



ON THE LIFE HISTORY OF THE 

 STRIPED BARFLY. 



(Chrysops vittatus Wiedemann.) 



This is a common species in Louisiana, for 

 which reason its life history may be properly 

 considered in this paper. Personally, I have 

 not worked out the life history of this particu- 

 lar species fully, so it seems best to quote as 

 follows from Hart's paper "On the Entomology 

 of the Illinois River and Adjacent Waters," pub- Lab - Volume 

 lished in Volume IV of the Bulletin of the Illinois State Lab- 

 or atory of Natural History, Page 228 : 



"The larvae were found in connection with other larvae in a weedy 

 and swampy brook. They were quite common, occurring in the mud 

 and the mats of dead stems, and rarely floating at the surface. The 

 first were seen March 28, but they continued to occur up to April 15, 

 increasing slightly in size. In the breeding cage they burrowed into 



the mud and vegetation. In the latter part 

 of May the water was allowed to dry up, 

 and on the 28th, all that remained was 

 poured off. June 1 to 3, three pupae were 

 formed in the damp mass of dead vege- 

 table matter resting on the mud in the 

 cage. Two imagoes emerged June 9, both 

 males, the third failing to transform. The 

 coloraTion of the larva readily distin- 

 guishes it. 



Length of larva, 10 to 15 millimeters, 

 diameter 1.6 millimeters. Head light-col- 

 rarti.v O rcd, mouth parts pale, tips of maxillary 

 diameters! 1 e ' palpi in line with the end of the labrum; 

 body whitish, a mottled appearance within at middle of body. 



