152 [July. 



intermediate tibiae, etc., will serve to distinguish D. tortimamis from 

 the moi'e nearly allied D. sinuatipes from the same region. The 

 posterior femora are no doubt toothed in the J of the present insect. 



16. — Diseinn suharmata, n. sp. 



S • Moderately elongate, narrow, widened posteriorly, shining; fiisco- 

 testaceoiis or castaneous, the prothorax in some examples aeneo-piceous, the 

 metallic lustre rarely extending to the elytra, the opaque patch on the latter 

 brown, the antennae ferruginous, the eyes black, the legs testaceous, the apices 

 of the femora and tibiae sometimes infuscate ; thickly clothed, the legs in- 

 cluded, with long, soft, erect or projecting hairs. Head coai'sely, closely 

 punctate, the eyes large, somewhat narrowly separated ; antennae very long, 

 moderately serrate, more slender than in most of the allied forms, joint 11 

 longer tlian 9 and 10 united, asperate within. Prothorax not or very little 

 wider than the head, feebly rounded at the sides, sligluly constricted before 

 the moderately prominent basal margin ; coarsely, closely punctate, depressed 

 in the middle at the base, and shallowly sulcate anteriorly. Elytra mode- 

 rately long, widening to the middle, about twice as broad as the prothornx ; 

 tinelj^ crenato-striate, the punctures transverse, the interstices almost Hat, trans- 

 Aersely rugulose, each with an irregular series of tine piligerous punctures ; 

 the opaque lateral patch elongate, oblique, extending from the iifth stria to 

 near the margin, and with several transverse impressed lines. Intermediate 

 tibiae widened and sinuate, obliquely excavate beyond the middle externally, 

 thus appearing twisted. Posterior femora feebly, angularly dilated towards 

 the apex. 



5. Antennae shorter and more slender, very feebly serrate, joint 11 

 equalling 9 and 10 united ; elytra without lateral patch and legs simple. 



Leuuth 6-6^, breadth 24,-2^ mm. ( J $ .) 



Hnh. : Brazil, Rio de Janeiro {Fry). 



Six males and three females. Extremely like -D. serraticoniis, the 

 male Avith smaller, less approximate eyes, more slender, less strongly 

 serrate antennae, a longer opaque patch on the elyti-a, twisted inter- 

 mediate tibiae, and subdenhite posterior femora, the female apparently 

 with a more coarselj' punctate prothorax. D. rufescens Pic (type, 5 ) 

 (1912), from Cayenne, ma}' be synon^-mous with this species, but it is 

 impossible to identify it from the incomplete description. 



17. — Disema serraficornis. 



S . Disetna serraticornis Makl., Act. Soc. Fenn. x, p. 651 (1875). 



J. Antennae very long, stout, strongly, obliquely serrate from joint 3 

 onward, 11 a little longer than 9 and 10 united, asperate within ; eyes 

 extremely large, almost contiguous; the opaque, oblique patch on elytra 

 large, covering a space between the striae 6 and 9 ; legs simple ; ventral seg- 

 ment 5 unimpressed, the partly exposed genital armature including two pairs 

 of long, slender hooks, and a long, compressed median lobe. 



