OF WASHINGTON, VOLUME XIII, I'.Hl. 29 



All the larvae of Tabanidag studied agree in the following general 

 characters: Body tapering at both ends, which are somewhat pointed; 

 skin shining and glassy, with opaque markings of a microscopic felted 

 pubescence. The palpi have short, thick joints; the basal joint of the 

 antenna is quite short, and there is a bunch of stiff, diverging, re- 

 curved hairs between each antenna and the median line above. The 

 full-grown Goniops larva, on the other hand, is pyriform and not at 

 all pointed at the ends. Its skin, except on the head and prothorax, 

 is not shining, but everywhere opaque and wrinkled or tuberculate. 

 The palpi have long, slender joints; the basal joint of the antenna is 

 very long, much exceeding the two terminal joints, and the hairs on 

 antennal flap are flexible and applied to the surface of the head. The 

 double second joint of the antenna of first-stage larvae is noteworthy. 



Of the tabanid pupa Hart says: 



The mesothorax is one-half longer than the prothorax, and the sec- 

 ond to seventh abdominal segments are encircled by continuous fringes 

 of slender spines. In Goniops the pupal mesothorax is three times 

 longer than the prothorax, and the fringes of spines on the abdominal 

 segments are not continuous, but interrupted and definitely grouped. 



EXPLANATION OP PLATES. 



PLATE I. 1, Goniops imago male; 2, female; 3, female ovipositing; 

 4, egg-mass from above; 5, egg-mass from side; <>, 

 egg-mass after hatching; 7, silhouette of full-grown 

 larva, with head retracted, showing inflated mem- 

 branous portion of first segment. Figs. 1 and 2, nearly 

 three times natural size; 3, twice natural size; 4, one 

 and a half times natural size; 5 nearly four times nat- 

 ural size; 6 and 7 nearly three times natural size. 

 Figs. 3, 4, and 5 from photos by H. S. Barber. 



PLATE II. Figs. 1, 2, and 3 are lateral, dorsal, and ventral views, 

 respectively, of the full-grown Goniops larva. All 

 about five times natural size. 



PLATE III. Figs. 1, 2, and 3 are lateral, dorsal, and ventral views, 

 respectively, of the female pupa shell of Goniops. 

 All about five and a half times natural size. 



ADDENDA Messrs. E. A. Schwarz and H. S. Barber obtained two 

 larva? of Goniops by sifting old leaves from a hollow in the ground on 

 Plummer's Island, Maryland, November 1, 1910. Mr. Barber states 

 that he has collected larvae in the same manner at Rosslyn and other 

 localities in .Fairfax County, Virginia. He notes the habit of throw- 

 ing out the mandibles with great rapidity and force, making a sharp 

 sound on striking a hard object. Larvae as usually found are much 

 more contracted than is shown in Plate I, fig. 7. 



