Dec, I902.] Carriker : New Mallophaga. 221 



bands, separated by clear sutures except between segments six and seven, and seven 

 and eight, where it forms a continuous patch, narrowing posteriorly to the border of 

 the eighth, where it widens into a narrow crescent ; transverse bands also separated 

 transversely by pale transverse bands through their middle ; ninth segment colorless, 

 with a slight median emargination on the posterior border. Legs short and stout, 

 brownish throughout, with slightly darker anterior margins. 



One adult female and one iitimature female secured from one indi- 

 vidual out of a large number of specimens of Lapland Longspur 

 {Cakarius lapponicus), found dead at Wray, Colo., November i6, 

 1901, by Prof. Lawrence Bruner and Dr. R. H. Wolcott. These 

 birds had been killed by flying against telegraph wires. 



This form resembles in many respects O-^oxvC^ picturatiis, but dif- 

 fers greatly in having the lateral bands of the abdomen reduced to 

 brownish-black blotches in the anterior angles of the segments instead 

 of a continuous band. As Osborn gives no laieasurements I am un- 

 able to compare it in this respect with his species. 



Nirinus angustifrons, sp. nov. (Plate XXI, Fig. z.) 



fgfuale.— Body, length 1.37 mm., width .32 mm.; body slender, head narrowly 

 parabolic in front, dusky, with blackish linear antennal bands and V-shaped ocular 

 blotches ; abdomen subparallel with heavy median bands and lateral bands reduced 

 to a dark spot in the anterior angles of the segments. 



Head, length .32 mm., width .22 mm., pale brownish throughout; front 

 narrowly parabolic, with one short hair in front of trabecule ; ocular emargination 

 slight ; temples rounded, with one short hair ; occipital margin slightly concave ; 

 trabecule uncolored, minute; eyes small, without hair; antennre long, subparallel, 

 segments i, 2 and 5 subequal, 3 and 4 shorter, equal; antennal bands narrow 

 blackish, submarginal, not reaching the tip of head ; two linear blacki.sh ocular 

 blotches forming V-shaped marks on each side of head at the ocular emargination ; 

 margin of temples darker, shading inward; a clear oral fossa constricted midway 

 from tip to mandibles, then widening abruptly to side of mandibles, which are large 

 and deep chestnut ; a small circular occipital signature ; occipital bands pale. 



Prothorax quadrangular, with angles and sides rounded ; posterior angle with a 

 very short hair ; a broad submarginal band running around on the lateral and 

 posterior sides, pale in its anterior portion, deep brown along the posterior transverse 

 portion ; a clear pustule without hair within the posterior angles. 



Metathorax longer than prothorax, with sides rounded and broadly diverging ; 

 posterior margin angulated on the abdomen, with three long hairs on each side near 

 the angles ; a dark brown blotch in the anterior angles, and large, irregular, sub- 

 marginal blotches running inward from the posterior angles; the whole thorax 

 slightly tinged with brownish. 



Abdomen large, sides subparallel, ground color of segments clear and translucent ; 

 posterior angles very slightly projecting, without hairs on first two segments ; segments 

 3-6 with one hair ; 7 and 8 with three, also four along the posterior margin of the 

 eighth ; lateral bands reduced to a deep brown spot in the anterior angles of segments 



