50 U.S. NATIONAL MUSEUM BULLETIN 248 posthumous 



Genus Eiconolipeurus Carriker 



Eiconolipeurus Carriker, 1945, Rev. Brasileira Biol., vol. 5, p. 91. — Type species E. 

 importunuus Carriker. 



The genus is closely related to Oxylipeurus, but can be distinguished from 

 it by the structure of the preantennal portion of the head, the genitalia, 

 distal abdominal segments of both sexes, and the transverse carina of the 

 frons replaced by two small, circular incrassations. 



Previously I considered the genus to be parasitic only on the avian genus 

 Odontophorus, it having been recorded from nine species of that genus. 

 However, it has now been taken on two other genera of the Phasianidae: 

 Dactylortyx t. thoracicus and Dendrortyx macroura dilutus. Both of these genera 

 are closely related to Odontophorus and possibly the parasite eventually may 

 be found on other genera of the Phasianidae. Apparently Oxylipeurus in 

 the Western Hemisphere is confined to the family Cracidae, and Eicono- 

 lipeurus replaces it on the family Phasianidae. 



Eiconolipeurus laticapitis, new species 

 Figure v:5 



Holotype male from Dendrortyx macroura dilutus Nelson collected by E. P. 

 Edwards at Patzcuaro, Michoacan, Mexico, Februaiy 1948 (in USNM). 



Diagnosis: In the shape of the head this is the most aberrant species of 

 the genus now known; the preantennary portion is very wide and with 

 circular margin, the antennary sinus is obsolete, and the first and second 

 segments of the antennae are unusually small. There is no indication of 

 the meso- or metathoracic suture on lateral margins, while the acetabular 

 carinae are submarginal. The distal abdominal segment diff"ers strongly 

 in structure from the other males of the genus. Unfortunately the distal 

 portion of the male genitalia is missing, but its supporting sclerites are 

 very distinct; it is easily distinguished by the figure presented. 



Measurements are as follows: 



E. laticapitis cf E. inexpectatus cf 



