280 Illinois State Laboratory of Natural History. 



Plate XI. 



46. Jalanus lineola, end of last segment of pupa. 



47. Tahaniis stygius, larva, dorsal view. 



48. Last segment of larva, side view, showing project- 



ing spine. 



49. lahanus sp. (5), larva, dorsal view. 



50. Tahanus atratus, larva, dorsal view. 



Plate XTI. 



51. Tabanxis atratus^ head of larva, low side view; a, 



eye; 5, antenna; c, labrum; d, mentum ; e, man- 

 dible;/", maxillary palpus; g, maxilla. 



52. Abdominal spiracle of pupa. 



53. Left thoracic spiracle of pupa. 



54. End of last segment of pupa. 



Plate XIII. 



55. Tahanus atratus, ^^'g mass and single ^^'g, latter 



containing the parasite, both enlarged. 



56. Phanurus tahanivorus Ashm., n. s., egg parasite of 



Tahanus atratus. 



Plate XIV. 



57. Stratiomyia norma, larva, dorsal view; and last 



three segments, ventral view. 



58. Odontomyia cincta, egg mass, with all except bot- 



tom layer removed from the lower portion, also 

 single egg, both enlarged. 



59. Larva, doi'sal view, and last three segments, ventral 



view. 



60. Odontomyia vertebrata, larva, dorsal view, and last 



three segments, ventral view. 



Plate XV. 

 Examples of breeding-cage and semicircular dip-net in 

 use at the Station. 



