316 TROCHILIDZ. 
of which are attached alternately on either side to a pendent stalk. ach flower 
resembles an inverted Roman helmet, and is attached as it were by the point of the 
crest to the stalk. It is a fleshy mass of a deep crimson colour, and the cavity of the 
calyx extends in a tortuous manner downwards towards the attachment of the flower 
to the stalk.” 
b". Rostrum elongatum plus minusve arcuatum ; tegule nasales parton exposite: cauda 
rotundata aut cuneata, rectricibus mediis elongatis ; remigum rhachides normales. 
a", Cauda rotundata. 
THRENETES. 
Threnetes, Gould, Mon. Troch. i. t. 13 (Oct. 1852); Salv. Cat. Birds Brit. Mus. xvi. p. 263. 
Threnetes contains five fairly well-defined species which are distributed over the 
northern portion of South America, trom the valley of the Amazons to the north coast. 
One species is peculiar to our country, ranging from Panama to Guatemala, having a 
near ally in Western Ecuador. 
In general form Threnetes resembles Glaucis, so much so that it has been merged in 
that genus by some writers. Besides some peculiarities in the coloration, it shows no 
serrations like those of Glaucis on the cutting-edges of the bill, which inall respects 
resembles that of Phaethornis. The tail is much more rounded and formed of wider 
feathers, the central rectrices not being produced far beyond the rest. 
1. Threnetes ruckeri. 
Trochilus ruckeri, Boure. P. Z. 8S. 1847, p. 46°. 
Glaucis ruckeri, Gould, Mon. Troch. i. t. 11 (Nov. 1851)?; Lawr. Ann. Lye. N. Y. vii. p. 319°; ix. 
p- 121‘; Sel. & Salv. P.Z.S. 1864, p. 364°; Salv. P. Z. S. 1870, p. 204°; Zeledon, An. Mus. 
Nac. Costa Rica, 1887, p. 121". 
Threnetes ruckeri, Reich. Aufz. d. Col. p. 15°; Salv. Ibis, 1878, p. 428°; Cat. Birds Brit. Mus. 
xvi. p. 265"; Salv. & Elliot, Ibis, 1873, p. 278 (partim)”. 
Supra nitenti-aureo-viridis, pileo obscuriore, macula postoculari et stria maxillari cervinis, loris, tectricibus 
auricularibus et gula antica nigris, pectore cinnamomeo, corpore subtus reliquo fusco-griseo, tectricibus 
subcaudalibus aureo-viridibus fulvo limbatis, rectricibus mediis dorso concoloribus, reliquis ad basin albis, 
dimidio distali nigro, apicibus albis: maxilla nigra, mandibula carnea apice nigra. Long. tota 4:5, ale 2°3, 
caudee 1°3, rostri a rictu 1°35. (Descr. maris ex Panama. Mus. nostr.) 
mari similis. 
Hab. Guatemata®; Costa Rica (Endres*, Zeledon, in U. S. Nat. Mus.), Angostura 
(Carmiol, Zeledon"), Jimenez’ (Zeledon, in U. S. Nat. Mus.); Panama, Veraguas 
(Warszewiez *), Mina de Chorcha®, Bibalaz (Arcé), Lion Hill (M‘Leannan ? °), Line 
of Railway (Arcé}°), Paraiso (Hughes 1°), 
Bourcier’s description of this species was based upon a specimen from an unknown 
locality. A few years after it was published Warszewiez sent two specimens from 
