212 U.S. NATIONAL MUSEUM BULLETIN 261 



length of second and third tarsomeres; other leg characters as in Phera. 



Male genitalia: Pygofer in lateral aspect variable, from slightly to 

 strongly produced posteriorly, with numerous dispersed microsetae and 

 occasionally with interspersed macrosetae, with a pair of ventral 

 processes. Plates separate throughout their length, short, not extending 

 as far posteriorly as pygofer apex, shape variable interspecifically, from 

 triangular to rounded or truncate apically, usually with numerous 

 dispersed microsetae, without macrosetae. Style variable interspecifi- 

 cally but never long and slender, length variable interspecifically 

 compared to apex of connective, with or without a preapical lobe, 

 usually rounded apically. Connective variable interspecifically, from 

 narrow to quite broad, usually with a median keel. Aedeagus sym- 

 metrical or not, always with processes which are variable interspecifi- 

 cally in location. Paraphyses usually absent (present as a basal sclerite 

 in D. truncata, new species). 



Female abdominal sternum VII with posterior margin produced or 

 emarginate medially. 



The lower limit of size in the above description is based on an 

 undescribed species from British Guiana, of which only a single damaged 

 female is at hand. The range of Dichrophleps is from the Guianas and 

 Para, Brazil, to Gorgona Island, Chatham Island in the Galapagos, and 

 to Bolivia. The Galapagos record is from a single female, species 

 unknown, in the British Museum. 



Dichrophleps is very closely related to Homalodisca, but is readily 

 distinguished by the much more extensively fused claval veins; by the 

 posterior femoral setal formula, which is 2 : 1 : or 2 : : in Homalodisca ; 

 by the face, which is flattened or depressed in Homalodisca; and by the 

 strongly protuberant eyes, which abruptly change the contour of the 

 sides of the head in dorsal aspect in Dichrophleps. 



A female specimen of Dichrophleps despecta Melichar in the Moravian 

 Museum is here designated lectotype. It bears labels: "Maroni/Guyane 

 Francaise; Meaux" and "Museum Paris/R. Oberthiir 1889" and 

 "despecta M/det Melichar" and "Collectio/Dr. L. Melichar/Moravsk6 

 museum Brno." 



The genitalia of the lectotype male of Dichrophleps aurea (Fabricius) 

 are nearly identical with figure 199, differing only slightly in that the 

 aedcagal shaft is slightly more twisted. The genitalia of the male 

 lectotype of D. elongata Melichar agree well with figure 204. 



Two specimens of Dichrophleps cingulifera (Walker) from the British 

 Museum were examined, one without abdomen, the other a female; 

 both were compared with the type by Dr. W. J. Knight. The specimens 

 are very close to D. despecta Melichar, and perhaps the two names are 

 synonynaous. 



