WEEVIL GENUS MAEMACTES — KISSINGER 485 



0.42 mm. from top to bottom, 0.25 mm. wide. Protliorax a trifle 

 longer than wide at base as 12:12.5, sides expanding from base to 

 widest point at middle, tliere one-fifth wider than base; punctures 

 deep, coarse, about 0.06 mm. in diameter, each puncture with seta 

 arising centrally from bottom; interspaces mostly slightly narrower 

 than diameter of punctures, flat, impunctate, with strong micro- 

 reticulation and with short median line present at center; postocular 

 lobes feebly developed. Elytra 2.3 times as long as protliorax as 

 30:13, widest in middle third, here about one-fifth wider than protliorax 

 at widest point as 6:5; intervals in part somewhat convex, irregular, 

 mostly wider (except at base) than punctures marking striae, with 

 one or two irregular rows of rather large, deep punctures, about 0.04 

 to 0.06 mm. in diameter, punctures bearing decumbent setae ranging 

 from 0.06 to 0.10 mm. long; apex of seta may extend past base of 

 next seta, surface of intervals with obscure microreticulation, polished, 

 shining; striae mostly incomplete except at base, with deep coarse 

 punctures irregularly placed, generally closer together in basal and 

 apical quarters, there generally separated by a distance subequal to 

 diameter of punctures; two or three closely adjacent strial punctures 

 may be connected by a short section of a completed stria; toward 

 central region of disc strial punctures much more widely separated by 

 flat intervals on the same level and connected to the adjacent elytral 

 intervals. Middle femur with a small tooth, hind femur with a 

 distinctly larger tooth; hind tibia mucronate on inner apical angle. 

 Sternites deeply, rather coarsely, moderately densely punctured; 

 male with sternites 1 and 2 broadly, shallowly concave medially, 

 suture between sternites 1 and 2 shallow and arched medially, sternite 

 2 as long as sternite 5 when measured medially. Median lobe of 

 aedeagus of male as figured. 



Holotype male, Chilpancingo, Guerrero, Mexico, intercepted in 

 quarantine Aug. 5, 1946, on orchid plants from Chilpancingo at 

 Laredo, Tex., USNM Type 65804. 



This species is readily distinguished, on the basis of external charac- 

 ters, from all the species of Maemactes, except rujicornis, hj its lack of 

 both broad scales and suberect setae on the elytra and by the width of 

 the frons. The median lobe of the aedeagus of imitator, in both size 

 and shape, differs widely from those of all the other species of Mae- 

 mactes, including rujicornis. 



The following external characters distmguish imitator from rnficornis: 

 imitator with elytral intervals in part somewhat convex; intervals 

 more or less polished and shining with vague microreticulation and 

 with punctures about 0.04 to 0.06 mm. in diameter, bearing setae 

 0.06 to 0.10 mm. long, setae yellowish in color and quite obvious in 

 contrast to dark background; strial punctures irregularly placed, 



