550 



EXPEBIMENT STATION KECOED 



Spergula arvensis — 



analyses, (31) 863. 



as coffee substitute, (40) 508. 



eradication, (31) 532. 



seed oil, notes, (36) 803. 

 Sperm — 



cells of fowls, vitality and activity of, (31) 474. 



iso-agglutinins, production by ova, (29) 167. 



oil, chemistry of, (35) 784. 



oil, hydrogenatcd, properties of, (34) 9. 

 Spermatogenesis— 



in hybrids, studies, (27) 371. 



in rabbits, (35) 167. 

 Spermatogonia, origin in male chick, (38) 173. 

 Spermatoxin, effect on female organism and ovum, 



(26) 877; (29) 167. 

 Spermatozoa^ 



development outside the egg, (26) 877. 



duration after fecundation in pullets and ducks, 

 (34) 864. 



morphological constituents, (30) 201. 



transportation, (29) 66. 

 Spermatozoids, effect on the blastula, (29) 66. 

 Spermophagus — 



piurae n.sp., description, (32) 658. 



subfasciatus, remedies, (40) 553. 

 Spermophiles, prevalence in Colorado, (28) 652; (.30) 



249. 

 Spermophilus citillus, notes, (28) 180. 

 Sphacelia — 



scirpicola, notes, (29) 345. 



sorghi, notes, (38) 848. 

 Sphaceloma ampelinum — 



in America, (36) .545. 



treatment, (28) 649. 

 Sphacelotheca^ 



cruenta and S. sorghi, confusion, (34) 444. 



reiliana on corn in Barbados, (33) 445. 



sorghi, inoculation experiments, (37) 749. 



sorghi, notes, (29) 547; (32) 146, 240; (35) 44; (37) 

 452. 



sorghi, studies, (38) 645; (39) 756. 



spp., notes, (27) 545. 

 Sphaenoptera geraellata, notes, (27) 863. 

 Sphaeralcea lindheimeri, food plant of cotton boll 



weevil, (31) 458. 

 Sphaerella — 



caricae n.sp., studies, (29) 849. 



coffeicola, notes, (.38) 51. 



convexula, notes, (26) 56. 



fragariae, treatment, (37) 246. 



heveae n.sp., notes, (39) 452. 



macularis, notes, (29) 51. 



maculiformis, studies, (28) 240. 



moricola, notes, (27) 547. 



nigerristigma n.sp., description, (32) 844. 



opuntiae, studies, (27) 352. 



relation to Ascochyta, (28) 849. 



rubina, notes, (26) 646. 



rubina, studies, (33) 649. 



sacchari, notes, (40) 157. 



sp. on chayote, (37) 755. 



spp., notes, (28) 845; (29) 345. 



tabiflca, notes, (26) 446. 



tremulicola, notes, (29) 51. 

 Sphaeronema^ 



fimbriatum — 



distribution and prevalence, (33) 743. 

 notes, (30) 150; (32) 343. 

 studies, (34) 156; (39) 854; (40) 347. 

 treatment, (28) 849. 



oreophilum n.sp., notes, (37) 630. 



parasiticum n.sp., description, (30) 746. 



sp. affecting sugar cane, (31) 539. 

 Sphaeronemella — 



fragariae n.sp., description, (36) 452. 



sp. on strawberries, (33) 744. 

 Sphaerophoria cylindrica, notes, (36) 460. 

 Sphaeropsidales, light and pycnidia formation, (38) 



225. 

 Sphaeropsis— 



ellisii, notes, (30) 751. 



maculans, notes, (37) 748. 



malorum — 



as affected by cold, (34) 538. 

 ascogenous form of, (30) 651. 

 biological strains of, (31) 445. 

 description, (29) 752; (30) 50, 650. 

 dissemination by tree crickets, (35) 548. 

 effect on composition of apples, (36) 148. 



Sphaeropsis — Continued, 

 malorum — continued. 



life history, (31) 446. 



notes, (27) 651; (28) 548; (29) 49, 748, 752; (31) 

 450; (34) 54, 247, 644; (35) 351; (39) 850. 



relation to apple collar rot, (.34) 157. 



relation to apple rot, (33) 348. 



studies, (32) 750; (35) 151. 



summary of information, (40) 251. 



temperature relations, (36) 649. 



transmission by tree crickets, (34) 653. 



treatment, (29) 49, 752; (30) 650, 

 necatrix, studies, (39) 859. 

 pseudodiplodia, notes, (27) 747; (37) 5.53. 

 sp. on peaches, (33) 248. 

 sp. on strawberries, (33) 744. 

 spp. relation to citrus gummosis, (29) 247. 

 spp., studies, (28) 240. 

 tumefaciens on limes, (34) 349. 

 tumefacieils, studies, (27) 652. 

 Sphaeropyx bicolor, notes, (31) 355. 

 Sphaerostilbe — 



coccophila. description, (33) 459. 



coccophila, notes, (27) 3.58, 860; (28) 196, 453; (29) 



852; (30) 455. 

 flavida, notes, (39) 849. 

 parasitic on scale insects, (30) 746. 

 repens, in Malava, (38) 52. 

 repens, notes, (28) 241; (34) 57; (35) 251; (37) 349; 



(40) 53. 

 repens on rubber, (33) 449. 

 sp., notes, (26) 245; (28) 149; (31) 55. 

 sp. on citrus, (37) 452; (40) 155. 

 sp. on tea roots, (40) 48. 

 Sphaerotheca— 

 humuli — 



notes, (29) 547. 



resistance to fungicides, (38) 450. 



studies, (29) 346; (39) 147. 

 mors-uvae — 



in Italy, (33) 447. 



life history, (32) 547. 



notes, (26) 344; (27) 750; (28) 448, 650; (30) 

 349, 845; (31) 545, 749; (33) 647, 846; (35) 650; 

 (37) 550. 



on currants, (34) 648. 



studies, (33) 347. 



treatment, (26) 345; (28) 349, 650; (29) 249; 

 (30) 750; (31) 841, 843; (34) 843; (36) 751. 

 pannosa^ 



control, (40) 751. 



notes, (27) 850; (30) 537; (32) 749; (37) 453, 

 839. 



on raspberry, (34) 749. 



studies, (.33) 347, 447, 854. 



treatment, (34) 442, 750. 



vars., inoculation experiments, (33) 647. 

 spp., notes, (26) 450; (40) 53. 

 Sphaerulina — 



aucubae n.sp., description, (27) 149. 

 suchumica n.sp., description, (35) 454. 

 taxi, notes, (26) 852. 

 Sphagnum — 



bogs, forest growth in, (.37) 837. 

 moss, digestibility, (30) 568. 

 moss, temperature conditions in, (34) 715. 

 moss, use in preparation of bandages, (37) 736 

 peat, fertilizing value, (31) 826. 

 peat, investigations, (28) 518. 

 relation to formation of upland moors, (29) 124 

 turf, digestibility, (35) 474. 

 turf, humus acids of, (27) 322. 

 Sphecoidea of Nebraska, (40) 553. 

 Sphenophorus — 



callosus, see Corn billbug. 



discolor injurious to small grain, (30) 161. 



maidis, life history, (35) 760. 



nebulosus, notes, (33) 256. 



obscurus on sugar cane, (40) 57. 



parvulus, notes, (26) 803; (29) 52, 252. 



phoenicieusis, notes, (35) 657. 



sculptilis, notes, (33) 58. 



sericeus, notes, (28) 752; (30) 356. 



sordidus, see Cosmopolites sordidus. 



sp., notes, (26) 354, 857. 



spp., control, (40) 655. 



spp., studies, (29) 56. 



venatus, notes, (26) 862. 



