Coxa anterior rounded, moderately distant. 



intermedial rounded, separated by the narrow extremity of the carina. 

 posterior large and prominent, rather distant, broadly laminated for their 

 whole length ; lamina ovate, slightly acuminate at the middle. 



It is not an easy matter to determine the tribe in which thi it genus 



should be placed. A.s its name impli difference of form exi ■ en the 



'in- males resembling Ptenidium, or more closely Camptodium, while the 

 females might be readily supposed to belong to Ptinella. It is therefore with some 

 hesitation thai 1 have placed it among the Trichopterygina ; the truncation of I 

 elytra is, although evident, but very Blight in the males; in the females ii 

 strongly pronounced, leaving several segments of the abdomen uncovered; the 

 abdomen has as many cm i tents as are found in Ptinella, and the antenna' 



in length and tenuity resemble Pteryc< 



Dimorphella Reitteri. 



D. Reitteri, Matthews, Ann. Mag. Nat. Hist. 6, iii. p. 190, 1889. 



L. c. ,•";■-,';•, lin. = - 0"68-0 - 75 mm. — Subovata, valde convexa, nitidissima, vel 

 flava, rel rufocastam a, pilis aur< is sparse vestita, elytris in maribus foveolate punc- 

 tata ; capiti tnodico. antice producto, modice punctato, oculis modicis, valde 

 prominentibus : rum longiori, multum latiori, ad medium lal 



minute i I r< mote punctato, interstitiis glabris, nitidis, lateribus marginatis, atqui in 

 maribus denteacuto, magnitudine variabili, ad media armatis, basim versus fortiter 

 constrictis, margine basali recta, angulis salientibus; elytris capiti atque pron 

 multum et longioribus et latioribus, ante media latissimis, in maribus tumide 

 incrassatis, et punctis foveolatis profui ote impressis, interstitiis uitidissimis, 



in feminis modice convexis et multum abbreviatis, lateribus fortiter marginal 

 apicibua plus minusve truncatis ; abdomine plus minus rto, apice Bat obtuso, 



integro ; pedibus atque antennis praelongis, gracillimis, laete flavis. 



Body Bubovate, very convex and very shining, either yellow or rufo-castaneous, 

 sparingly clothed with golden hair, marked with foveolate punctures ou the 

 ; ra of the ma 



Head moderate, produced in front, moderately punctured; eyes moderate, very 

 prominent : antenna- very long and Blender, yellow. 



Thorax rather longer and much broader than the head, widest at the middle. 

 minutely and remotely punctured with the interstices smooth and shin 

 sides margined, and in the mal< d with a sharp tooth of varia 



near the middle, strongly constricted towards the base, basal margin strai 

 with tla : acute and Balii nt. 



Scutellum very large, triangular, indistinctly punctured, and very shinii 



Elytra in the male- much longer and broader than the head and thorax, in the 

 female- shorter, wid ■ middle, in the mail - and 



much incra tely marked with deep foveolate punctures, with the 



inter-tic, - very shining, in the female- moderately convex, translucid and much 

 abbreviated with the extremities rounded, sides strongly margined, extremi 

 more or less trunca 



Abdomen more or less exposed, with the apex rather obtuse and entire. 

 long and slender, yellow. 



Under parts yellow, with the metasternum distinctly punctured and a row of di 

 puncture- on each ventral segment. 



Habitat, South America, found in Brazil, near Blumenau. 



Four males and two females of this pretty insect wire found near Blumi n 

 in Brazil, and kindbj presented to me by Berr E. Reitter. 



F 



