Vll 



PAGE 



Search for young carp, season of 1909 308 



Feeding habits of young carp in field and in laboratory aquaria, 1910 398 



Spawning dates, Havana and vicinity, 1910 and 191 1 399 



Situations selected for spawning 399 



Estimated numbers spawned, hatched, fungused, and maturing, Dan- 

 hole's field (600 acres), 1910 400 



Habits and local preferences of fry and fingerlings 400 



The fry's struggle for existence from hatching to lingerling stage \02 



Possible remedial measures 404 



ARTICLE Vni. OBSERVATIONS ON THE BREEDING HABITS 

 OF FISHES AT HAVANA, ILLINOIS, 1910 AND 1911, BY R. E. 

 RICHARDSON, (i Plate) March, 1913 405-416 



Paddle-fish (Polyodoii spathula) 405 



Short-nosed gar ( Lcpisosteiis platostomus) 405 



Dogfish ( A mia calva ) 407 



Buftalo (Iciiobus cyprinelln and /. bubalus) 408 



Chub-sucker {Erimyzon sucetta oblongus) 410 



Yellow bullhead {Ameinirus natalis) 410 



Speckled bullhead (Anieiiirus nebulosiis) 410 



Black bullhead (Ameiurus melas) 410 



Stone cat {Schilbeodes gyrinus) 411 



Grass pike (Esox vermiculaftis) 411 



Top-minnows (Funduhis notatiis and F. dispar) 411 



Silverside (Labidcsthes sicculus) 411 



Speckled crappie (Pomoxis sparoidcs) 411 



Warmouth bass (Chceiiobryttus gulosus) 412 



Orange-spotted sunfish { Lcpoviis humilis) 412 



Blue-gill sunfish ( Lcpoviis pallidus) 413 



Pumpkinseed sunfish { Eupomotis gibbosiis) 414 



Large-mouth black bass ( Micropterns salmoides) 414 



ARTICLE IX. BIOLOGICAL AND EMBRYOLOGICAL STUDIES 

 ON FORMICID^. BY M. C. TANQUARY, Ph.D. (S Plates, i 

 Text Figure) May, 1913 417-479 



I. The life history of the corn-field ant, Lasins nigcr var. aviericaiiits 



Emery 417 



Methods 417 



Detailed history of a few first-year colonies 420 



Hibernation 436 



Summary 440 



Additional notes 441 



II. Experiments on the trail formation and orientation of the common 



house ant, Monomoriwin pharaouis L 443 



Additional notes '. . .452 



Conclusions 453 



III. Studies on the Embryology of Camponotus hcrculcanns var. fcrru- 



ginciis Fabr. and Mynnica scabriiwdis var. sabiileti Meinert 454 



Methods 454 



The egg 455 



Formation of the blastoderm 439 



The development of the external form 469 



The development of the external form of the emliryo of Mynnica 



scabriuodis Nyl 471 



Literature cited 476 



Explanation of plates 478 



