58 (57) Small (3.1-3.8 mm long, 1.2-1.5 mm wide); black, with 



antennae and tarsi rufous, palp rufo-testaceous; penis 

 extending beyond apices of parameres more than one 

 third the length of parameres: Elsianus shoemakei 

 Larger (over 4 mm long) ; penis extending beyond apices of 

 parameres less than one quarter the length of the 

 parameres 59 



59 (58) In Arizona; rufous to black; 4-5.2 mm long, 1.7-2.1 mm 



wide (it may be that more than a single species is 

 represented by these measurements; very few specimens 

 have been taken) : Elsianus moestus 



In Texas and eastern New Mexico; rufous to black; 4-5.4 

 mm long, 1.7-2 mm wide (Fig. 63) (further study may 

 reveal this species to be synonymous with E. moestus) : 



Elsianus texanus 



60 (57) Elytron with one sublateral carina; pronotum without 



oblique sculpturing 61 



Elytron with two sublateral carinae (rarely only one in 

 Micro ayllo epus , which has oblique sculpturing on 

 posterior half of pronotum) 62 



61 (60) Posterior half of pronotum divided by a conspicuous 



median longitudinal impression; pronotum with a 



transverse impression slightly anterior to middle; 



brown to black; 2.6-3.3 mm long, 1-1.2 mm wide (Fig. 64): 



Neoeylloepus boeseli 

 Pronotum undivided except by transverse impression at 

 anterior two-fifths; testaceous; 1.5-1.7 mm long, 0.5- 

 0.6 mm wide (Fig. 65): Neoelmis caesa 



Figs 64-65 Dorsal view of adult: 64- Neooylloepus boeseli; 

 65- Neoelmis oaesa. 



38 



