270 ORCHIDEZ. 
Mazillaria densa, Lindl. Bot. Reg. t. 1804. 
SovtH Mexico, Misantla (Schiede), Zacuapan (Leibold ; Ehrenberg), Cordillera of 
Vera Cruz (Galeotti, 5121; Liebmann; Heller), Sierra San Pedro Nolasco &c. (Jur- 
gensen, 895) ; GuatemMaLa, Alotenango (Godman & Salvin). Hb. Kew. 
3. Ornithidium fulgens, Rchb. f. Beitr. Orch. Centr.-Am. p. 76. 
Costa Rica, Naranjo (Wendland). 
4. Ornithidium histrionicum, Rchb. f. in Bonplandia, 1856, p. 324. 
MExico. 
5. Ornithidium paleatum, Rchb. f. in Linnea, xli. p. 36. 
CENTRAL AMERICA. 
6. Ornithidium strumatum, Endres et Rchb. f. in Gard. Chron. n. 8. ii. p. 772, 
et Xenia Orch. iii. p. 10, t. 207. 
Costa Rica (Endres). 
7. Ornithidium, sp. 
GuaTEMata, Vera Paz (Bernoulli). Hb. Kew. 
64. COMPARETTIA. 
Comparettia, Poepp. et Endl. Nov. Gen. et Sp. i. p. 42, t. 73 (excl. C. saccata) ; Benth. et Hook. 
Gen. Plant. iii. p. 558. 
Three species are described, ranging from Mexico to Peru and perhaps to Brazil. 
1. Comparettia coccinea, Lindl. Bot. Reg. 1838, t. 68; Walp. Ann. vi. 
p- 688. 
Mexico? Braziu? 
Lindley says ‘This. .... is said to be a native of Brazil; it, however, agrees so 
entirely with dried specimens collected near Jalapa, and now before me, that some 
mistake is to be suspected in its reputed country.” It is worthy of note that this 
orchid figures in one of Miss North’s pictures of Brazilian plants at Kew. 
2. Comparettia falcata, Poepp. et Endl. Nov. Gen. et Sp. t. 73; Benth. Pl, 
Hartw. p. 93; Walp. Ann. vi. p. 688; Bot. Mag. t. 4980. 
Comparettia rosea, Lindl. Bot. Reg. 1840, Misc. p. 78. 
GUATEMALA, mountains of Arcutuno and Medio Monte (Hartweg), without locality 
(Bernoulli, 302).—CotomBia ; VENEZUELA; Cuba; Jamaica. Hb. Kew. 
65. TRICHOCENTRUM. 
Trichocentrum, Poepp. et Endl. Nov. Gen. et Sp. ii. p. 11, t. 115 ; Benth. et Hook. Gen. Plant. iii. 
p. 559. 
A Tropical-American genus of about twelve species. 
