62 



is not clear. The first record (Path. Hist., 1109; August 28, 

 1906) concerned a Guatemalan amazon (P. Z. G. Lab., 790) 

 and contains the statement that this was one of three birds 

 showing the same parasites and same anatomical findings; 

 that the three birds had been recently purchased for the 

 collection, and that one died within two days after its recep- 

 tion; that they were placed in separate cages on their arrival, 

 and that no other birds in the same portion of the house 

 presented the same features of disease as these; that bunches 

 of mucus containing the worms were found in the lower 

 third of the distended esophagus in all three, acute enteritis 

 in two, chronic enteritis in one, and parenchymatous degenera- 

 tion of all the organs in all three. From this time forward 

 the records of discovery have been numerous, including all 

 twenty-five birds here referred to, as well as four or five more 

 received since the present series was completed. The earlier 

 examples and the greater number have been obtained from 

 parrakeets and allied birds; but, evidently from unusual 

 conditions prevailing in the bird house for the dissemination 

 of the parasites, they have been found distributed in a 

 variety of species, in several genera, and even in several 

 families of hosts. The birds thus far found infested include 

 the following; Conurus pertinax, two birds (P. Z. G. Lab., 

 1125, 1042); Ccmurus leucotis, one bird (P. Z. G. Lab., 1076); 

 Chrysalis guatemalas, one bird (P. Z. G. Lab., 790); Chrysotis 

 leucoccphalus, one bird (P. Z. G. Lab., 1131); Chrysotis 

 auripalliata, one bird (P. Z. G. Lab., 910;) Chrysotis ochrop- 

 tera, one bird (P. Z. G. Lab., 891); Platycercus eximius, 

 five birds (P. Z. G. Lab., 843, 850, 862, 867, 889); Platy- 

 cercus barnardi, one bird (P. Z. G. Lab., 1004); Platycercus 

 palladiceps, two birds (P. Z. G. Lab., 876(?), 877); Bol- 

 borhynchus monachus, two birds (P. Z. G. Lab., 1049, 1164); 

 Bolborhynchus lineola, one bird (P. Z. G. Lab., 871); Pal- 

 ceornis fasciatus, one bird (P. Z. G. Lab., 1052); Protogerys 

 virescens, one bird (P. Z. G. Lab., 422); Eclectus roratus, 

 one bird (P. Z. G. Lab., 1152); Pceocephalus senegalus, one 



