_Breeding schedule._--The 117 records of breeding span the period April 1 to September 20 (Fig. 8); the modal date for laying of first clutches is May 1, subsequent to which breeding activity is regular but asynchronous. _Number of eggs._--Clutch-size is 3 eggs (3.5, 3-6; 65). Seasonal variation in clutch-size is as follows: Date Mean clutch-size Number of records April 1-20 3.0 6 April 21-May 10 3.8 25 May 11-May 31 3.3 15 June 1-June 20 3.6 11 June 21-July 20 3.3 7 Nests are placed about five feet high (ranging from 10 inches to 40 feet) in osage orange, elm, grape, rose, red cedar, coralberry, willow, cottonwood, gooseberry, oak, elderberry, box elder, arbor vitae, Lombardy poplar, Forsythia, pines, honeysuckle, wisteria, lilac, red haw, hickory, dogwood, and sycamore. =Rose-breasted Grosbeak=: _Pheucticus ludovicianus_ (Linnaeus).--This is a local and at times common summer resident in eastern Kansas, in woodland, edge, and riparian timber. Specimens taken in the breeding season and actual records of breeding come from Clay, Riley, Doniphan, Leavenworth, and Douglas counties. This species meets and hybridizes with the Black-headed Grosbeak west of the Flint Hills. Temporal occurrence in the State is indicated in Table 19. _Breeding schedule._--Eleven records of breeding span the period May 11 to July 10; the modal date for laying is probably June 5. _Number of eggs._--Clutch-size is 3 or 4 eggs. Nests are placed in deciduous trees, in forks and crotches six to 30 feet high. =Black-headed Grosbeak=: _Pheucticus mehnocephalus melanocephalus_ (Swainson).--This summer resident is common in western Kansas, chiefly along streams. Individuals referable to this species by sight records alone breed in fair numbers as far east as Cloud and Sedgwick counties, but to the east of these stations numbers are reduced, partly as a result of presumed competition with the Rose-breasted Grosbeak. Hybrids between these two grosbeaks are regularly produced. The easternmost record of breeding by this species is at St. Mary's, Pottawatomie County, where a male was seen as probably mated with a female Rose-breasted Grosbeak. Temporal occurrence is indicated in Table 19. _Breeding schedule._--Sixteen records of breeding span the period May 11 to July 10; the modal date for egg-laying is June 5. _Number of eggs._--Clutch-size is about 4 eggs (3.7, 3-4; 4). Nests are placed about 12 feet high in a variety of deciduous trees.