NEW MALLOPHAGA. 1 57 



those of abdomen, in front of which a narrow whitish 

 space broadest medially. Legs concolorous with pale 

 ground color of body, with hairs and thickened femora. 



Abdomen oblong, with convex sides and ends, all the 

 segments except 9 being of approximately equal width; 

 especially long hairs in posterior angles and shorter hairs 

 on surface; each segment except 9 with broad transverse 

 brown band covering nearly whole surface of segment 

 and darkest along posterior margin ; lateral extremities 

 of bands dark brown to black, forming narrow interrupted 

 lateral bands; segment 9 wholly colored, paler than trans- 

 verse bands, large, rounding with numerous long hairs. 



Menopon indistinctum n. sp. Plate xiv, figs. 6 and 7.) 



Two females taken from an American Avocet, Recur- 

 virostra americana (Lawrence, Kansas). This species 

 most clearly resemble crocatum Nitzsch (ed. Geibel, 

 Zeitschr. f. ges. Naturwiss., 1866, vol. xxviii, p. 392), from 

 a Numenius arquata and Hcematopus ostralegus (Piaget), 

 but there are differences quite as considerable as those 

 which have been used by Giebel and Piaget to separate 

 the various Menopon species found on the shore birds. 

 Crocatum, lutescens ct. al. ought, perhaps, to be grouped 

 together as a single species with several varieties, as is 

 done for Docophorus communis, the common Docophorus 

 of the passerine birds. However I add this species from 

 our Avocet to the group which must sometime be well 

 revised. The noticeable differences between this new 

 species and crocatum lie in the number and disposition of 

 the hairs of the head and thorax. The species does not 

 at all resemble Nitzsch's species from the European Avo- 

 cet, Recurvirostra avocetta (micrandum, Zeitschr. f. ges. 

 Naturwiss. ed. Giebel, 1866, vol. xxviii, p. 392), which 

 has a thorax without hairs, and an abdomen withuncolored 

 longitudinal lines. 



