1909] Kellogg: New Species of Insects. 119 



Thus there is nothing too definite about the taxonomic indi- 

 cations to be derived from the Hoatzin's Mallophagan parasites. 

 Unless the Lvpeurus could he a straggler from some maritime 

 bird species! Mr. Beebe informs me that there has been no op- 

 portunity for such straggling; either normal (that is, from ap- 

 proach of the hosts in nature) or abnormal (that is, from 

 approach of the host bodies in live cage or game bag or on the 

 work table). 



The descriptions of the two new species follow : 



Colpocephalum armiferum, new species. (Fig. 38.) 



One male and three females taken by C. Wm. Beebe from 

 the Hoatzin, Opisthocomus hoazin, (Venezuela) . 



A Colpocephalum of general likeness to C. spinosum from the 

 African Partridge, Francolinus capensis, and to C. spineum from 

 various maritime birds and C. spinulosum from shore birds. 

 But this species from the Hoatzin is quite distinct from any of 

 these forms and in its possession of an extraordinary thorniness 

 of thorax and abdomen stands well apart from any other species 

 in the genus. 



Female, body, length 1.7 mm. ; width, .58 mm. ; many stout, 

 pointed spines along the lateral margins and on the posterior 

 borders of prothorax and metathorax; unicolorous pale golden, 

 except for two strong blackish-brown ocular blotches and less 

 distinct and large occipital and clypeal blotches. 



Head, length, .36 mm. ; width, .45 mm. ; the usual marginal 

 hairs all of the character of spines. Prothorax with a series of 

 short, stout spines along the posterior border; metathorax with 

 a series of large conspicuous spines along the nearly straight 

 posterior margin, and with spines on the posterior halves of the 

 lateral margin. Shorter but conspicuous spines along the lateral 

 margins of the abdominal segments with longer spines and hairs 

 on the last two segments. 



Male, body, length 1.6 mm. ; width, .51 mm. ; head, length, .33 

 mm. ; width, .43 mm. ; a little darker golden in color than female, 

 with the brown blotches of the head a little more pronounced. 

 Last abdominal segments without flexible hairs but with lateral 

 margins and posterior margin of last segment with strong spines. 

 The strongly chitinized genitalia show plainly through the body 

 wall in the single male specimen I have. 



Lipeurus absitus, new species. (Fig. 39.) 



One male and two females taken by C. Wm. Beebe from 

 the Hoatzin, Opisthocomus hoazin, (Venezuela). 



This new Lipeurus of the group clypeati sutura distincta 

 (all the other members of which have been taken from strictly 



