NOKTII AMKIIICAN (< »1 l.i >p TICKA. 11 



Colors above more or less metallic I»y •*<►!>>' »•*• 



Color not metallic, piceous, elytra with a broad, basal, dull red band. 



Humeral unibotie black ; legs entirely black iii:ijor. 



Humeral umbone red; tibite red on outer ed<;e NiilkfaMCiata. 



M. |>yiM>i>j'$;a T.,ac., Mon. p 524. — General color above hluisli iireen. metallic, 

 elytra witli a broad basal, reddish yellow band, their apices witli brilliant golden 

 spot with coppery reflection, a similar color at ajiex of thor.ix ; surface glabrous; 

 scutellum smooth. Length .40 inch. ; 10 mm. 



The sexes do not differ much in this species. The last ventral 

 segment has a small fovea in the f'en)ale. 

 Occurs in Arizona, common in Mexico. 



Itl. major Crotch (Coscinoptern), Proc. Acad. 1873. p. 29. — Form robust, jii- 

 ceous, moderately shining, surface sparsely cinero-pubesceiit, elytra with a broad, 

 dull red, basal band enclosing a black s])ot at the umbone. Head piceous, mod- 

 erately closely punctate. Thorax rather sparsely punctate on the disc, more 

 <!losely and coar.sely toward the sides, hind angles well defined, not prominent; 

 scutellum closely punctate. Elytra not closely punctate, the punctures coarser 

 toward the sides and much finer toward the apex. Pygidium densely punctured 

 and cinereo-pubescent, a shining, space near the apex, which issubcarinate along 

 its middle. Body beneath densely punctulate and cinereo-pubescent. Legs 

 black, cinereo-pubescent. Length .36 — .42 inch. : — 10.5 mm. 



Of this species I have seen females only; they have the usual fovea 

 in the last ventral segment. This form is evidently closely related 

 to, and, in all probal)ility, identical with dimidiata, which is found 

 in the adjacent regions of Mexico. 



Occurs in Texas near the Rio (xrande. 



M. silblasciata Lee (Ooscinoptera). Trans. Am. Ent. Soc. 1868, p. 56. — 

 Resembles the preceding in color, except that the basal red band is divided at 

 the suture and the umbone is not black, surface above more sparsely pubescent. 

 Head moderately closely punctate. Thorax closely ptinctate at the sides, more 

 sparsely on the disc, the median line conspicuously smooth, hind angles well 

 defined ; scutellum closely punctate. Elj'tra moderately coar.sely, but not closely 

 punctate, finer toward the apex, but not denser at the sides Pygidium densely 

 punctate and pubescent with a short, smooth carina. Body beneath densely 

 punctulate and pubescent. Legs piceous, the outer edge of the tibiae rufo-testa- 

 ceous Length .24 — ..30 inch. ; 6 --7.5 mm. 



In the male of this species both mandibles are subangulately 

 prominent at the sides. The females have normal maii<lil)k's and a 

 fovea in the last ventral segment. The pygidium is more convex in 

 the male. 



The typical specimen of this species has the basal fascia of the 

 elytra so broadly divided at the suture that the species was described 

 as having merely a (piadrangular humeral spot. Specimens are more 

 abundant in which the sutural black division is very narrow or evi'ii 



tra:vs. am. ent. soc. xix. .janiaky. 189-'. 



