48 Journal New York Entomological Society. [Vol. xiv. 



paler at sutures ; ninth segment broadly rounded behind with narrow transparent 

 margin thickly set with a fringe of short, sharp-pointed transparent hairs. 



Male. — Body, length 2.5 mm., width .9 mm. : head, length .4 mm., width .73 

 mm.; abdomen narrower than female; genitalia distinct, projecting chitin bar 

 reaching second segment. 

 Colpocephalum burmeisteri, new species (PI. ii, Fig. 5). 



Males and females from Ava chloroftera (Argentina). 



Description of Female. Body, length 2.2 mm., width 1.3 mm.; slender; well 

 marked with entire transversal abdominal blotches with wide, whitish intersegmental 

 spaces and dark brown, narrow lateral bands. 



Head, length .33 mm., width .55 mm.; front flatly rounded, with slight rect- 

 angular orbital emargination ; about five short hairs on each lateral margin of fore- 

 head and two long and three longish hairs in region just in front of orbital emargina- 

 tion ; the palpi projecting as also the antenna; ; temples narrow, two long hairs and 

 at least four short hairs ; occipital margin concave ; general color yellowish brown, 

 with narrow blackish occipital border and blackish curving ocular blotches. 



I'rothorax rather small, wider than long ; lateral angles obtuse with three spines ; 

 posterior margin, from angle to angle, making a flattened semicircle and bearing eight 

 hairs ; general color yellowish brown, regions of lateral angles distinctly darker, 

 transverse chitin band transparent, narrow, with a spine rising from each extremity ; 

 curving chitin bands at extremities of the transversal bar distinct, narrow. Meta- 

 thorax with nearly straight posterior margin, and a series of hairs along the margin ; 

 lateral margins with six spines ; posterior angles with two hairs and three spines ; 

 lateral margin with several spines. Legs rather large with marginal markings. 



Abdomen long, slender, widest at segments 2 and 3 ; segments I to 6 with a 

 long hair in the posterior angle, segments 7 to 9 with two or three long hairs ; dorsal 

 surface of each segment with a transverse thickset row of uncolored hairs near the 

 posterior margin ; all segments with distinct dark brown lateral margin. 



Malt'. — Body, length 1. 9 mm., width .55 mm.; head, length .33 mm., width 

 .5 mm.; posterior end of last abdominal segment flatly rounded ; genitalia distinct, 

 the long chitin bar extending to the third abdominal segment. 



Laemobothrium caracaraensis, new species (PI. ii, Fig. 6). 



Males and females from a Caracara eagle, Polyborus tharos 

 (Argentina). 



Description of Female. — Body, length 6.5 mm., width 2 mm. ; strong and dis- 

 tinct lateral margins and paired median dark brown blotches on abdomen ; a finely 

 marked species. 



Head, length 1. 13 mm., width 1.2 mm., ocular emargination very prominent, 

 front straight ; each side of the middle with two long and three short marginal hairs : 

 two strong hairs at the angle ; two terminal segments of the palpi projecting beyond 

 lateral margin of the front ; temporal margin slightly angulated ; eyes double, con- 

 spicuous ; mandibles brown, with teeth dark brown ; distinct dark brown band along 

 posterior and lateral margins. 



Prothorax, with distinct lateral angles, in apex of which two long hairs and three 

 spines ; two more long hairs and many spines along posterior lateral margins ; ground 



