72 PROCEEDINGS OF THE NATIONAL MUSEUM vol.93 



Zenillia, but caution is advised in order that mistakes may be avoided. 

 In Aplomya the abdomen is of ordinary form. 



All the species of Aplomya possess an inner ventral bristle on the 

 mid tibia. Aplomya affirm and A. estigmenensis of this genus have 

 two bristly hairs behind on the apex of the hind coxa. All the other 

 species lack these bristly hairs excepting Aplomya epicycles, in which 

 they are present on some of the specimens. 



The following grouping of the species placed in Aployma is sug- 

 gested for those workers who prefer or insist on restricted genera or a 

 definition of species groups: 



1. confinis, theclarum {Aplomya). 



2. mitis, caesar, covfusionis. 



3. trisetosa. 



4. submissa {Collatia ). 



5. afllnis, helvina crassiscta, estigmenen is (Huebaeria). 



6. epicydes, imitator, trichiosomae. 



7. fronto, pheosiae, cerurae, neurotomae. 



8. sctinervis. 



9. polita. 



The first four groups are the most characteristic of Aployma, but 

 they have distinctive characters of their own. Groups 5 and 6 are 

 closely related and are characteristic of Huebneria. Groups 8 and 9 

 are very similar in many respects. 



KEY TO THE SPECIES OF APLOMYA 



There are 20 species included in the key, 17 of which occur in the 

 Nearctic and 3 in the Palearctic realm. Inasmuch as Aplomya mitts 

 has been released in the northeastern and north-central parts of the 

 United States, it is included in the key. Aplomya confirm and J., affirm 

 are included because the names have been utilized to refer to indig- 

 enous Nearctic species in our literature for the past 40 to 50 years. 

 It was considered that the inclusion of the 3 Palearctic species would 

 increase the systematic value of the key and eliminate possible con- 

 fusion as to the usage of these specific names. 



1. Sternopleural macroehaetae three 4 



Sternopleural macroehaetae four 2 



2. Postsutural dorsocentral macroehaetae four ; seutellum reddish yellow, black 



at base; apical scutellars curved backward, decussate; no discal bristles or 



macroehaetae on second and third abdominal segments 3 



Postsutural dorsocentral macroehaetae three ; middle portion of propleura 

 hairy; seutellum black; apical scutellars erect or proclinate. decussate ; 

 front at vertex very narrow; one pair of discal macroehaetae on second 

 and third abdominal segments (male only) 



1. submissa (Aldrich and Webber) (p. 75) 



3. Disk of seutellum covered with long, fine, erect hairs ; with a discernible pair 



of discal scutellars (Palearctic species) 2. confinis (Fallen) (p. 75) 



