246 PHYTOPHAGA. 



be necessary to point out the differences between the two insects. In the present 

 species the thorax is less shining and finely punctate ; and although some specimens 

 have a stronger punctuation, the latter is never deep, or almost rugose-punctate as in 

 D. semiambita, in which this strong sculpturing can be well seen without a glass. The 

 elytra in D. subfastuosa are marked and of the same colour as in the allied insect, with 

 the exception that the transverse flavous band at the middle does not extend to the lateral 

 band of the same colour, but is abbreviated, in which respect it resembles D.purulensis. 

 In their punctuation the elytra in D. subfastuosa differ in being more distinctly geminate- 

 punctate, the punctures being at the same time much finer, and not visible without a 

 glass, the reverse being the case in B. semiambita. In all other respects the species 



are similar. 



I would not, perhaps, have attached specific distinction to the present insect, which 

 may possibly be only a local form of D. semiambita, had I only a single specimen for 

 comparison ; but I possess of both species many examples, which are all separated by 

 the differences pointed out; moreover D. subfastuosa is from the Atlantic side of 

 Guatemala, B. semiambita being from the Pacific and Mexico. 



10. Doryphora purulensis. (Tab. XV. fig. 8.) 



Very convex, ovate, piceous below, above dark chestnut-brown, shining, a spot near the scutellum, a band near 

 the lateral margin, the posterior half of the suture, and a transverse short band at the middle flavous. 



Length 4-5 lines. 



Head very finely and closely punctured; antennae black, the three basal joints fulvous, terminal ones gradually 

 thickened, longer than broad. Thorax narrowly transverse, the sides much rounded anteriorly, surface finely 

 and rather remotely punctured, shining. Elytra very convex at the first half, abruptly deflexed towards the 

 apex, very finely punctate-striate, of a dark shining chestnut-brown, each elytron with a longitudinal 

 band close to the lateral margin, a narrower one at the posterior half of the suture, and joined at the 

 apex to the marginal band, a short transverse stripe at the middle, and a round spot near the scutellum at 

 the base flavous. Mesosternal process robust and curved. 



Rah. Guatemala, Purula (Champion). 



Again very closely allied in colour to the two preceding species, and principally to 

 the last, from which it may be distinguished by the much more polished upper surface, 

 especially that of the thorax (which in B. subfastuosa is always opaque), the much 

 finer punctuation of the elytra, and their more convex shape ; the flavous band at the 

 base of the elytra in the allied insects is here interrupted in the middle, so as to form 

 a spot near the scutellum. Many specimens have been received, all of which show 

 the above slight but constant differences from B. subfastuosa. More than twenty 

 specimens were obtained at Purula. 



11. Doryphora bicolor. (Tab. XIV. fig. 5.) 



Doryphora bicolor, Jacoby, P. Z. S. 1877, p. 515 \ 

 Eab. Nicaeagua, Chontales x (Janson, Belt). 



