46 M. A. Caniker 



median patch covering- a portion of segment four, all of seg- 

 ments five and six, and a part of seven. 



Male. — Body, length 2.43 mm., width .69 mm. ; head, length 

 .69 mm., width .55 mm.; differs from the female only in smaller 

 size and in last segment of abdomen, which is with.out the dark 

 lateral bands in anterior portion, i., longer, more flatly rounded, 

 and slightly snuiate on the sides ; a dusky, median, transverse 

 band in the anterior portion ; genital hooks are slender, widely 

 diverging in tlie median portion, with ends straight and con- 

 verging, and extending the width of the sixth and seventh seg- 

 ments. 



Two females collected from Myiarchiis lawrencei nigricapiUus, 

 and two males from Myiozrtctcs cayancnsis, Juan Vinas, Costa 

 Rica, March, 1902. This form has a superficial resemblance to 

 P. sucinaccinn Kell., but differs in the shape of the head, mark- 

 ings of thorax, presence of palettes, and size. 



Physostomum angulatum Kell. 



Kellogg, Nezv Mallopliaga II, p. 515, pi. LXX, fig. 5. 



One female of this well-marked species collected on Taiuigra 

 cana, Juan Vinas, Costa Rica, March, 1902. 



This is another strange instance of distribution, but there can 

 be no doubt as to the identification of the specimen since it 

 agrees perfectly with Mr. Kellogg's plate and description of 

 angulatitin. 



Physostomum australe Kell. 



Kellogg, Ne-w Mallopliaga II, p. 516, pi. LXX, fig. 4. 



One female collected on Tanagra cana, at Juan Vinas, Costa 

 Rica, March, 1902. 



The finding of this species on Tanagra cana is as unaccountable 

 as that of P. angidatum, but the identification is absolutely 

 certain. 



Physostomum subangulatum sp. nov., pi. V, fig. 3 



Female. — Body, length 4.37 mm., width 1.06 mm.; almost 

 uncolored, with a faint tinge of golden on abdomen, with nar- 



168 



