34 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 144 



Table U. — data from frank a. hartman, auk, 

 VOL. 71, NO. 4, pp. 467-469 (1954) 



Cardiac and pectoral muscles of trochilids 



Weight Weight of 



„ , of pectoral ,,,. 



Body heart musculature ^ing 



weight length* 



qm. % of body weight mm. 



Glaucis hirsuta affinis 9 6.13 2.27 27.6 56.5 



" $ 6.95 — — 58.6 



Phaethornis guy coruscus $ 5.78 2.40 28.6 61.5 



" superciliosus cassinii 5 6.15 2.19 — — 



" longuemareus saturatus $ 2.64 2.42 — 37.9 



Phaeochroa cuvierii 2 7.95 — — 68.6 



$ 9.30 1.74 — 72.2 



Campylopterus hemileucurus $ 11.92 1.95 33.7 73.9 



Florisuga mellivora 2 6.96 1.83 — 65.2 



Colibri thalassiniis cabanidis 2 4.8 — — 61.0 



5. - 5.28 1.95 — 66.9 



Anthracothorax nigricoUis nigricollis 2 7.33 2.27 — 65.2 



S 6.86 — — 66.9 



Chlorostilbon canivetii assimilis 2 3.13 1.88 26.5 44.1 



;' $ 3.03 — — 45.6 



Damophila julie panamensis 2 3.03 2.02 — 42.6 



$ 3.35 — — 43.4 



Amasilia amabilis costaricensis 2 3.85 2.23 — — 



$ 4.78 _ _ _ 



decora $ 4.74 2.30 — 54.0 



" edward niveoventer 2 4.43 2.28 28.5 51.0 



$ 4.97 — — 53.8 



" edward 2 4.15 — — 52.2 



tsacatl tzacatl 2 4.72 2.12 26.6 54.9 



" $ 5.40 — — 58.3 



Eupherusa exima egregia $ 4.35 2.34 — 60.1 



Elvira chionura 2 2.83 2.25 — 46.8 



$ 2.93 — — 50.3 



Chalybura buffonii micans 2 5.6 — — 62.0 



Lampornis casianeoventris 2 5.26 2.16 22.5 64.3 



Heliodoxa jacula henryi 2 7.39 1.98 27.9 66.2 



Eugenes fulgens spectabilis S 5.7 2.16 — 73.5 



Heliothrix barroti 2 5.7 — — 66.6 



Archilochus colubris 2 3.36 2.31 — 44.5 



$ 3.2 — — 38.5 



Selasphorus scintilla 2 2.23 2.40 24.7 35.7 



" " $ 2.33 — — 32.7 



* The wing-length measurements are averages taken from Ridgway, "Birds of North and 

 Middle America." 



Unpublished data from Frank A. Hartman (Letter to C. H. Greenewalt, 

 March 17, 1960) 



Pectoral muscle as 

 % of body weisjht , 



Ratio 



Large Small Large/Small 



Anthracothorax nigricollis 21.5 8.6 2.50 



Damophila julie 16.0 10.5 1.52 



Selasphorus scintilla 18.2 9.9 1.84 



Florisuga mellivora 20 10 2.00 



