60 ENTOMOLOGICAL NEWS. [Feb., 'l2 



Piranga bidcntata sanguinolenta in Costa Rica. Our speci- 

 mens have a head much longer than that figured by Carriker, 

 and may possibly be a distinct variety, but the brachythora.v 

 group (to which this species belongs) is at present too little 

 known to justify the giving of names in it on slight differences. 



Nirmus lucidus n. sp. 



One adult female and two immature specimens from the 

 marbled godwit, Limosa fedoa, Playa Maria Bay. This species 

 is close to Osborn's N. cordatiis, but the more general elongate 

 form of lucidus will at once separate it from that species. 



Description of female.- Length 2.2 mm. ; width .6 mm. ; elongate ; 

 color clear, with translucent brownish yellow markings ; rather Ljpeuroid 

 in general appearance. 



Head, length .45 mm. ; width .43 mm. ; pale brownish yellow ; sides 

 slightly convex, and broadly rounded front; clypeus flatly rounded in 

 front ; trabeculae very small, colorless ; antennae short and thick, col- 

 ored same as head ; eye flat, colorless, with one fine bristle ; light-col- 

 ored antennary bands converging in front, the space between them 

 clearer but with darker triangular mark; mandibles light brown in 

 color. 



Prothorax small, sub-quadrangular, sides convex ; narrow light 

 brownish-yellow lateral bands almost unite at middle of posterior mar- 

 gin; coxal markings showing through as brownish yellow blotches. 

 Metathorax larger, form similar to that of prothorax, except for ob- 

 tusely angulate posterior margin ; marginal bands distinct, though faintly 

 colored; hairs on side very weak; coxae showing through as brown- 

 ish yellow blotches; legs stout, tibiae brownish yellow, femora with 

 large yellow spot, otherwise colorless. 



Abdomen elongate elliptical, widest at fourth segment; posterior 

 angles of segments little rounded, with a single marginal hair except 

 on the first two segments; dorsum with short scattered hairs; color 

 clear without marginal bands ; transverse blotches light yellowish brown 

 in color, extending width of segments, not interrupted; last segment 

 with very faint blotch. 



Nirmus nesiotes sp. nov. 



One female from Haematopus bachmani, San Martin Island. 

 This new Nirmus approaches Piaget's coniceps and Carriker's 

 rhamphasti, the first from a hornbill, the other from a toucan. 

 It is rather remarkable to find such closely related Mallophag- 

 ous species on birds as widely separated as to relationship. 



