MONOXIA. 497 



2. Monoxia guttulata ? (Tab. xxvil. fig. 25.) 



Monoxia guttulata, Lee. Rep. Pac. Surv. 1857, p. 70 \ 



ifafl. North America, California x . — Mexico, Northern Sonora (Morrison). 



It is probable that I am rightly referring the Sonoran specimens to M. guttulata ; 

 these all have longitudinal depressions on the elytra, one of the characters given by the 

 author as peculiar to that species. A specimen before me, supposed to be M. guttulata 

 and kindly sent to me by Dr. Horn, is marked like M. debilis and M. obtusa, so that 

 there seems to be doubt about these species. It will be seen from the figure given 

 here that in the Mexican examples of what I suppose to be M . guttulata the elytra are 

 closely spotted with black, and the thorax also showing several black markings, besides 

 being very short and transverse. The underside is generally piceous, the abdomen 

 being sometimes paler, and the claws in those specimens which I have examined seem 

 to be simple. The femora and tibiae are generally each marked with a small piceous 

 spot. 



3. Monoxia debilis? 



Monoxia debilis, Lee. Proc. Acad. Phil. 1865, p. 222 \ 



Bab. North America, California 1 . — Mexico, Tupataro (Salle). 



In the Munich Catalogue this insect is given as a variety of the preceding ; whether 

 this is correct or not I am unable to say. The single Mexican specimen before me 

 agrees very nearly with the description of M. debilis. There is no longitudinal 

 depression of the elytra visible as in M. guttulata, and the markings are confined to 

 three or four rows of single distant spots which form a short stripe only near the 

 suture. 



L Monoxia semifasciata. 



Oblong ovate, finely pubescent, black ; thorax testaceous, rugose ; elytra more finely rugose, fu3cous, with 

 traces of longitudinal fulvous bands. 



cJ . Claws obsoletely appendiculate ; $ , claws simple. 



Length 2 lines. 



Head closely rugose, fuscous; the distinctly raised frontal tubercles and the clypeus, testaceous, shining; 

 antennae not extending much further than the base of the elytra, black, the third joint long, the following 

 one slightly widened, short, and of equal length ; thorax rather more than twice as broad as long, the 

 sides slightly rounded, the anterior angles not prominent, the posterior ones slightly oblique, the posterior 

 margin a little concave-emarginate at the middle, the surface closely and irregularly rugose, more or less 

 distinctly depressed at the middle and at the sides, rather shining, and almost without pubescence ; 

 scutellum testaceous, pubescent, its apex broadly truncate ; elytra rather flattened, very closely and finely 

 rugose, covered with greyish and distinct but not thick pubescence, obscure fuscous, each with some obscure 

 fulvous spots of longitudinal shape near the sutural and lateral margins; the underside and the legs black, 

 rather shining, the abdominal segments narrowly margined with fulvous ; the apex of the last abdominal 

 segment in the male triangularly excavated at the middle, the sides rounded, that of the female slightly 

 emarginate. 



Eab. Guatemala, Champerico (Champion). 

 biol. centr.-amer., Coleopt., Vol. VI. Pt. 1, January 1887. 3 S 



