Sporophila torquiola morelleti (Bonaparte): White-collared Seedeater.—Breeding is known for this species in May and a male collected on September 2 was in breeding condition (Paynter, 1955a:293). Our records seem to be the first for the summer. Specimens taken in July and August were breeding.
Specimens (7): ♀, 40918, 9.2 gm. (July 8), 1 km. SW Puerto Real, Isla del Carmen; ♂, 40919, testis 7 × 6 mm., 8.2 gm. (July 15), 7½ km. W Escárcega; ♀, 40913, ovary inactive, 7.9 gm. (August 4), 4 km. WSW Puerto Juarez; ♂, 40914, testis minute, 7.8 gm. (August 14), ♀, 40915, ova to 6 mm. (August 15), ♀, 40917, ovary moderately active, 7.0 gm. (August 16), and ♂, 40916, testis 7 × 5 mm., 7.6 gm. (August 16), 4 km. NNE Felipe Carrillo Puerto.
Volatinia jacarina splendens (Vieillot): Blue-black Grassquit.—The only previous record of breeding is a male having slightly enlarged testes taken on June 1 (Paynter, 1955a:293). Our specimens showed various stages of reproductive activity when taken on July 10.
Specimens (6): ♂, 40926, 8.9 gm. (July 10), and ♂, 40925, testis 2 × 1 mm., 8.5 gm. (July 10), 1 km. S Puerto Real, Isla del Carmen; ♂, 40924, testis 4 × 2 mm. (July 10), ♂, 40922, testis 6 × 4 mm., 8.3 gm. (July 10), ♀, 40923, ova to 2 mm., 10.3 gm. (July 10), and ♂, 40921, 8.2 gm. (July 10), 5 km. S Champotón.
Arremonops rufivirgata verticalis Ridgway: Olive Sparrow.—Apparently the only previous record of breeding was the laying female on June 14 reported by Paynter (1955a: 294). Males collected in July and August had enlarged testes; a juvenile, barely able to fly, was taken on August 14. Two specimens were beginning to molt.
Specimens (9): ♀, 40932, ova to 1 mm., 20.8 gm. (July 21), and ♂, 40933, testis 8 × 6 mm., 21.2 gm. (July 21), Pisté; ♀, 40930, ovary moderately active, 23.2 gm. (July 26), and ♂, 40931, imm., 22.7 gm. (July 26), 3½ km. N Pisté; ♂, 40934, testis 6 × 4 mm., 24.5 gm., molting—1st and 2nd primaries ensheathed (August 14), ♂, 40935, juv. (remiges and rectrices ensheathed basally), 17.7 gm. (August 14), ♀, 40936, imm., 25.0 gm (August 14), ♀, 40937, ovary granular, 22.6 gm., molting—2nd primaries ensheathed (August 15), and ♂, 40938, testis 7 × 5 mm. (August 15), 4 km. NNE Felipe Carrillo Puerto.
Arremonops chloronota chloronota (Salvin): Green-backed Sparrow.—Evidence presented by Monroe (1963) indicates that A. chloronota and A. conirostris are not conspecific. Specimens collected in breeding condition in July seem to be the first breeding records of this species on the peninsula.
Specimens (7): ♀, 40942, ova to 3 mm., 29.6 gm. (July 11), 5 km. S Champotón; ♂, 40944, testis 10 × 6 mm., 27.0 gm. (July 14), ♂, 40943, testis 5 × 3 mm., 23.1 gm. (July 14), and ♂, 40945, testis 7 × 4 mm., 25.5 gm. (July 15), 5-{7½} km. W Escárcega; sex? 40939, 22.9 gm. (July 20), 6½ km. W Pisté; ♂, 40940, imm., 21.5 gm. (August 4), 4 km. WSW Puerto Juarez; ♀, 40941, 26.5 gm., extensive body molt, (August 15), 4 km. NNE Felipe Carrillo Puerto.
Table 2. An Alphabetical List of Species of Mallophaga Removed from Birds Collected on the Yucatán Peninsula in 1962.
| Mallophaga | Hosts |
KU Catalogue Nos. of specimens of hosts |
| Actornithophilus ochraceus | Snowy Plover | 40426, 40431 |
| Amyrisidea spicula | Chachalaca | Specimen not preserved |
| Austromenopon sachlebeni | Willet. | 40441 |
| Carduiceps zonarius | Sanderling | 40443, 40444 |
| Ciconiphilus obscurus | American Egret | 40402 |
| Colpocephalum foetens | Black Vulture | Specimen not preserved |
| Colpocephalum megalops | King Vulture | 40403 |
| Columbicola macrourae | Zenaida Dove | 40399 |
| Columbicola sp. | Red-billed Pigeon | 40457 |
| Craspedorrhy sp. | Gray Hawk | 40415 |
| Lunaceps holophaeus actophilus | Sanderling | 40444 |
| Myrsidea sp. | Tropical Mockingbird | 40771 |
| Myrsidea sp. | Cave Swallow | 40690, 40704 |
| Myrsidea sp. | Sulphury Flat-billed Flycatcher | 40685 |
| Philopterus excisus | Cave Swallow | 40697 |
| Philopterus sp. | Sulphury Flat-billed Flycatcher | 40682, 40686 |
| Philopterus sp. | Great Kiskadee | 40664 |
| Philopterus sp. | Turquoise-browed Motmot | Specimen not preserved |
| Philopterus sp. | Yellow-green Vireo | 40804 |
| Penerirmus sp. | Red-capped Green Woodpecker | 40594 |
| Quadraceps assimilis major | Snowy Plover | 40431 |
| Quadraceps assimilis major | Wilson Plover | 40432, 40436 |
| Quadraceps carrikeri | Willet | 40442 |
| Quadraceps ravus | Spotted Sandpiper | 40438 |
| Quadraceps sp. | Laughing Gull | 40449 |
| Saemundssonia brevicornis | Cabot Tern | 40452 |