361 



7. A small but distinct tubercle just in front of base of middle leg 

 in addition to and some distance above the one bearing the paired 



hairs* nigrescens Palisot de Beauvais. 



— No tubercle present as above stygius Say. 



In order to keep this paper within reasonable limits I have not 

 drawn up descriptions of the larvae and pupae of this genus, reserv- 

 ing that for a future article in which I hope to cover the family. 



Most of the species have already been described by C. A. Hart in 

 his paper "On the Entomology of the Illinois River and Adjacent 

 Watersf. My Species i is the only larva not included in that paper. 

 It differs from the other larvae before me in being entirely white and 

 without lines or patches of pubescence, as well as in being more 

 robust, and less tapered at the extremities. In general appearance it 

 very closely resembles an asilid larva, the resemblance being accentu- 

 ated by the small size of the locomotor organs; and it stood as 

 "Asilidae" in our collection. The specimen was obtained at Pulaski, 

 111., June I, 19 lo, in a pit-cage used in rearing white-grubs. This is 

 a surprising occurrence as most of the species are confined to damp 

 ground or to aquatic surroundings. 



The species designated as Species 2 and Species 3 in the key to 

 larvae are Hart's species a and h. 



Principal Papers dealing with the Biology 

 OF North American Tabanidae:): 

 Hine, J. S. 



'03. Tabanidae of Ohio. Special Papers, Ohio State Acad. Sci., 



No. 5. 

 '06. Habits and life histories of some flies of the familv Tabanidae, 



Tech. Ser., No. 12, Pt. 2, Bur. Ent., U. S. Dept. Agr. " 

 '06a. A preliminary report on the horse-flies of Louisiana, with a dis- 

 cussion of remedies and natural enemies. Circ. 6, State Crop Pest 

 Commission of La. 

 '07. Second paper upon the horse-flies of Louisiana. Bull. 93, Agr. 

 Exper. Station La., State Univ. 



McAtee, W. L. 



'11. Facts in the life-history of Goniops cliri/socoma. Proe. Ent. 

 Soe. Washington, 13 : 21. 



Walton, W. R. 



'08. Notes on the egg and larva of Goniops chrysocoma (0. S.). Ent. 

 News, 19 : 464. 



*I do not know whether this character will hold good in a series as my material 

 contains only one specimen of nigrescens (in very poor condition) and but 2 of 

 stygius. 



IBnll. 111. State Lab. Nat. Hist., Vol. 4, Art. VI. (1895) 



tSee also C. A. Hart's Art. VI, Vol. 4, Bull. HI. State Lab. Nat. Hist. (1895) 



