186 
Psyche 
[Vol. 94 
Type material Holotype female (LACM): Costa Rica: Golfito, 
August 21, 1957 (Arnold Menke). Allotype male (LACM) and para- 
types (1 female, 3 males, USU and author’s collection): Panama: 
Canal Zone: Gamboa, 5 mi SE, March 1, 1959 (W. J. Hanson). 
According to Mr. Hanson’s field notes, the allotype and paratypes 
were collected near a military access road through an area of rain 
forest which had been cut over, but had developed a subsequent 
overstory. 
Remarks. Atopagenia appears to be only distantly related to 
other genera in the Ageniellini. The form of the female occipital 
carina and the pronotum of both sexes apparently is apomorphic in 
the tribe. There are at least some similarities to the Old World genus 
Macromeris in size, color and pilosity (especially of the legs), pres- 
ence of a definite malar space, long antennae and retention in the 
male of the transverse groove on the second sternum. Other funda- 
mental features of Macromeris are quite different, however. The 
first metasomal segment has a suture separating an epipleurum, the 
transverse groove on the second sternum of the female is not in an 
extreme anterior position, the anal vein of the posterior wing is 
strongly recurved, the pygidium of the female is noticeably differen- 
tiated, nearly bare and the basal hooklets of the male genitalia are 
double. 
Because of the densely hairy ultimate tergum of the female, it is 
unlikely that Atopagenia menkei constructs cells of mud or similar 
materials as do females of at least some species of Macromeris and 
Auplopus (Williams, 1919: 79), but one is tempted to speculate that 
the unusual modification of the occipital carina and pronotum are 
adaptations for prey capture in confined situations. 
Acknowledgements. I wish to express my thanks to Mr. Roy R. 
Snelling, Los Angeles County Museum (LACM) and to Dr. Terry 
Griswold, USDA, ARS, Logan, Utah for providing the material 
used here. Thanks are also due Mr. William J. Hanson, Department 
of Biology, Utah State University, Logan (USU) for providing notes 
on the Panama locality. Mr. Michael C. Day, Department of Ento- 
mology, British Museum (Natural History), London, kindly com- 
pared specimens with Cameron’s material in the British Museum. 
Drs. Howard E. Evans, Colorado State University, Ft. Collins and 
Lynn S. Kimsey, University of California, Davis reviewed and made 
suggestions on the manuscript. In addition, Dr. Kimsey executed 
one of the drawings (fig. 1). 
