438 Annals of the Carnegie Museum. 



Habitat. — There are several specimens of the male at hand that 

 come from Chapada, near Cuyaba, Matto Grosso, Brazil, also a 

 couple of males that were taken at Corumba, Brazil, H. H. Smith 

 collector. The type is the property of the Carnegie Museum. 



There are several female specimens before me which may belong 

 with the male described above. They were taken at Corumba, as 

 were also some of the males. They are placed here with some doubt 

 because of the greater number of tibial spines (19-21) and the different 

 style of pronotal punctulation (variolose). Otherwise the rostrum 

 and antennal characters agree with those of the males. The measure- 

 ments of one of these females is given above. 



23. Tetanorhynchus longicornis sp. nov. 



This insect is unusually slender so far at least as the male is con- 

 cerned. It may be recognized from the other species of the genus 

 by the extreme length of the antenna 3 , which are fully one-half longer 

 than the rostrum of the vertex. Subgenital plate long, acuminate, 

 and with its sides fairly strongly compressed, prominently carinated 

 below and at middle of sides, the upper edges margined. 



Head long and slender, evenly narrowing from base to the eyes, 

 viewed in profile the front is but little sinuate; the occiput moderately 

 transversely rugulose, provided with a low blunt median longitudinal 

 and two supplementary lateral (one on each side) carina?. Sides of 

 head also provided with a strong rounded carina that extends from 

 the outer margin of the base of the clypeus to the back edge of the 

 eyes; frontal costa prominent throughout as a rounded ridge or 

 carina, the upper end of which branches at the ocellus and gradually 

 fades away between the heavy anterior borders of the eyes. Rostrum 

 quadrate, transversely wedge-shaped, about one-third longer than the 

 depressed eyes, gently tapering and with the apex rounded, the lateral 

 margins both above and below coarsely carinated, the upper disk 

 convex and somewhat transversely rugose, lower disk flattened or 

 gently sulcate, smooth; the outer sides sulcate and provided with a 

 slender median carina that extends two-thirds of its length. Eyes 

 strongly depressed, a little more than twice as long as broad. An- 

 tennae elongate, fully twice the length of the rostrum, the basal joint 

 one-half the length of the eyes. Pronotum sub-depressed, not 

 separated from the sternum by lateral grooves, the surface rather 

 profusely and finely punctulate, near the middle of the dorsum 



