12 



NORTH AMERICAN FAUNA. 



Columba flavirostris madrensis Nelson. 

 Leptotila capitalis Nelson. 

 Buteo borealis fumosus Nelson. 

 Polyborus cheriway pallidits Nelson. 

 Psiltacula insularis Ridgway. 

 Trogon ambiguus gold-man i Nelson. 

 Dryobates scalaris graysoni Baird. 

 Nyctidromus albicollis insularis Nelson. 

 Amazilia yraysoni Lawrence. 

 lache lawrencei Ridgway. 

 Platypsaris aglaice insularis (Ridgway). 

 Myiopagis placens minimus Nelson. 

 Icterus graysoni Cassin. 



Cardinalis cardinalis marice Nelson. 

 Piranga bidentata flammea (Ridgway). 

 Vlreo flavoriridis forreri (Von Madarasz). 

 Vireo hypochryseus aordidus Nelson. 

 Compsotlilypis insularis (Lawrence). Oc- 

 curs also on the mainland near San Bias. 

 GranateUus francescce, Baird. 

 Thryothorus lawrendi (Ridgway). 

 Thryothorus lawrendi magdalence Nelson. 

 Melanotis ccerulescens longirostris Nelson. 

 Myadestes obscurus insularis Stejneger. 

 Merula graysoni Ridgway. 



Cncmidophorus mariarum Giinther. 



FLORA. 



The islands were visited near the end of the long dry season, when 

 most of the herbaceous plants were withered and lifeless, but repre- 

 sentatives of 136 species, largely shrubs and trees, were secured. 



The general appearance of the vegetation was the same as that in 

 similar situations on the mainland. Among the most notable plants 

 were the Spanish cedar (Cedrela), three species of wild fig (Ficus), two 

 of Pithecolobium, five of Solanum, two of Ipomcea, a Passiflora, cassias, 

 euphorbias, a large agave, a large cereus, and two opuntias. 



On San Juanito the vegetation is largely made up of bushes and 

 scrubby trees 8 to 15 feet high, with many agaves on the sandy southern 

 end. Agaves are very numerous also on the northern end of Maria 

 Madre. On the latter island the forest is rather low and scrubby near 

 the shore, but increases in luxuriance farther up the slopes, especially 

 along the bottoms and sides of the canyons, where Spanish cedars, wild 

 figs, and several other trees attain a large size. In its primeval con- 

 dition, before the advent of woodcutters, it must have presented a fine 

 example of tropical forest growth. Now, only a few specimens remain 

 to show what the original condition must have been. Along the sum- 

 mit of the island the dense forest is made up of slender-trunked trees, 

 called 'palo prieto' by the natives, which I was unable to identify. 

 On Maria Magdalena the conditions were similar to those on Maria 

 Madre, but a larger percentage of the original forest still remains intact, 

 although the Spanish cedars are mainly gone. Maria Cleofa is more 

 rocky and sterile, and the trees are stunted and brushy. Several spe- 

 cies found on the other islands appeared to be wanting here. The 

 report on the plants shows that the flora of the islands is very similar 

 to that of the mainland, and the fact that several new species were 

 found may be due to our imperfect knowledge of the mainland flora. 



