NORTHWESTERN MEXICO. 271 



Tam. HiEUNDiNiD^. 



38. Progne suhis (Linn.). 

 Guadalajara, Tepic, Grayson. 



" I found it breeding in Tepic, in the month of May, also in Guadalajara ; they were nesting under the 

 eaves of the houses, or in the water spouts. It is seldom seen in the locality of Mazatlan, and then only 

 accidental and migratory, flying very high." 



39. Eirundo horreorum, Barton. 

 Guadalajara, Tepic, Grayson. 



"Very abundant in Tepic, where they breed in May and June under the roofs of houses, in the corridors; 

 also found in Guadalajara. Only accidental on the seacoast in September and October, apparently migrating." 



40. Tachycineta bicolor Vieill. 

 Mazatlan, Grayson. 



" Specimen shot in September, not common." 



41. Tachycineta alhilinea Lawr. 

 Mazatlan, Grayson. 



" This handsome little swallow is common at Mazatlan, where it is a constant resident, one among the few 

 swallows that is not migratory. At all seasons of the year its twitter may be heard about the eaves of the 

 tile houses or the spacious corridors of the peculiarly constructed Moorish Mexican haciendas. We often see 

 it skimming along the streets, at times almost touching the pavement in its pursuit of flies. Its customary 

 haunts are near or about large towns or haciendas, and rarely have I seen it far from some human habitation. 

 In April it commences to form its nest, usually beneath the eaves of houses or in holes in the wall, often in the 

 hollow tubes for conveying the water from the flat roofs of the buildings. They are very sociable in their 

 habits, and may often be seen in considerable numbers perched upon the roofs of the houses." 



42. Petrochelidon lunifrons Say. 

 Mazatlan, Tepic, Grayson. 



" I found this species breeding in the banks of the Mazatlan River in May ; it appears to be a summer vis- 

 itant, as I have not observed it in the winter months." 



In Col. Grayson's list of swallows lie has tte name of " Bank Swallow," but there are no 

 specimens by which to determine the species referred to ; it may be either Cotyle riparia, 

 Stelgidopteryx serripennis or 8. fulvipennis, neither are there any notes to elucidate the 

 question. G. riparia has been obtained at Tehuantepec, by Prof Sumichrast, but neither 

 of the others. 



Fam. ViEEONiDJE. 



43. Icteria virens var. longicauda Lawr. 



" longicaudata Finsch, Abh. nat. Ver. zu Bremen, 1870, p. 331. 

 Mazatlan, Tepic, Grayson. 



" Common in brushy localities from October to April." 



