238 Mr. Oliver E. Janson's Dcscrvptioiu of 



H. cafitanca and atripennis, when examined under a lens, 

 present a similar minute punctuation, but wliile in H. torrida 

 this punctuation is sufficiently dense to impart a dull ap- 

 pearance to the surface, in IT. castanea it is coarser and 

 less dense, — hence the insect is slightly shining, and in 

 IT. atripennis it is so exceedingly minute and sparse as not 

 in the least to subdue its polish. 



DiapTionia Digglcsii, n. sjj. Plate VII., fig. 1. 



? . Breviter ovata, nigra, thorace castaneo, tenuiter 

 nigro marginato, elytris nitidis, caeruleo tinctis, clypeo 

 subquadrato, antice late emarginato, capite thoraceque 

 dupliciter punctatis, fere opacis, scutello magno, acuminate, 

 nitido, elytris grosse profundeque subseriatim pinictatis, 

 nitidis. Long. 16 lin., lat. 9 lin. 



Broadly ovate, black, elytra with a blue tint especially 

 conspicuous in tlie punctures, thorax castaneous, narrowly 

 margined with black. 



Head nearly opaque, with numerous deep punctures, the 

 interstices very thickly and minutely punctured, clypeus 

 subquadrate, shallowly emarginate in front, rounded at the 

 sides. 



Thorax somewhat thickly strewn with large deep punc- 

 tures, the interstices very densely and minutely punctured, 

 causing the surface to appear almost opaque, posterior 

 margin trisinuate. 



Scutcllum very shining, large, triangular, its apex 

 acuminate, faintly punctured, with a few large irregularly 

 disposed punctures. 



^////rff .shining, with the suture depressed, covered ^ith 

 very large, deep, coniiuent punctures, disposed in irregular 

 rows on the disc, sutural interstice thickly and minutely 

 punctate, with a few large punctures very sparingly dis- 

 tributed on the basal two thirds, bat becoming gradually 

 denser towards the apex, humeral callus moderately 

 developed, nearly smooth. 



Pygidium transversely strigose, reddish-brown. 



Beneath shining, sparsely punctate at the sides, minutely 

 and thickly punctate in the centre, with a few large 

 irregularly disposed punctures ; anterior portions with long 

 black hairs ; an ill defined spot near the anterior angle of 



