=Tree Swallow=: _Iridoprocne bicolor_ (Vieillot).--This is a summer resident in extreme northeastern Kansas; nesting birds have been found only along the Missouri River in Doniphan County. Habitat is in open woodland, and in Kansas is always associated with water. Temporal occurrence in the State is indicated in Table 14. _Breeding schedule._--Eight records of breeding span the period May 21 to June 20; the modal date for egg-laying is May 25. The small sample may not accurately reflect the peak of nesting activity. _Number of eggs._--Clutch-size is 5 or 6 eggs (5.5, 5-6; 4). Nests are placed chiefly in abandoned woodpecker diggings in willows, four to ten feet high, over water. =Bank Swallow=: _Riparia riparia riparia_ (Linnaeus).--This summer resident is common wherever cut-banks suitable for nesting activities allow relatively undisturbed behavior. The species is almost always found near water. Temporal occurrence is indicated in Table 14. _Breeding schedule._--Sixty records of breeding span the period May 11 to June 20 (Fig. 6); the modal date for completion of clutches is June 5. Nearly 75 per cent of all clutches are laid in the period May 21 to June 10. Under unusual circumstances time of breeding can be greatly delayed; such circumstances occurred in 1961 in many places along the Kansas River in eastern Kansas, where the soft, sandy-clay banks were repeatedly washed away in May and June by high water undercutting the cliffs. Bank Swallows attempted to work on burrows in late May, but stabilization of the banks occurred only by late June, and the peak of egg-laying for many colonies was around July 12. Records for 1961 are omitted from the sample used here (Fig. 6). _Number of eggs._--Clutch-size is 5 eggs (4.8, 3-7; 60). Yearly clutch-size at one colony 3 miles east of Lawrence, Douglas County, is as follows: 1959: 5.2, 19 records 1960: 5.0, 12 records 1961: 3.7, 11 records 1962: 4.8, 18 records The sample for 1961 is that taken in early July when breeding occurred after a delay of more than a month, as described above. Nesting chambers are excavated in sandy-clay banks, piles of sand, piles of sawdust, or similar sites, at ends of tunnels one to more than three feet in depth from the vertical face of the substrate. =Rough-winged Swallow=: _Stelgidopteryx ruficollis serripennis_ (Audubon).--This summer resident is common in most places; it is not restricted to a single habitat, but needs some sort of earthen or other substrate with ready-made burrows for nesting. Temporal occurrence is indicated in Table 14. _Breeding schedule._--The 14 records of breeding are in the period May 11 to June 30; the modal date of egg-laying is June 5. Seventy per cent of all eggs are laid in the period May 21 to June 10. _Number of eggs._--Clutch-size is 5 eggs (5.0, 4-6; 4).