TIPHIA. 245 



clypeus slightly projecting, the projection impunctate, shining, and depressed ; the 

 mandibles ferruginous, black at the base and apex. Pronotum with the basal half 

 with large, separated punctures ; the apical half impunctate. The mesonotum with a 

 few scattered punctures, the sides impunctate. Scutellum with large punctures at the 

 sides and apex, and some smaller ones down the centre ; postscutellum sparsely punc- 

 tured. Median segment shining, impunctate ; the sides of the apical slope shagreened ; 

 the central furrow thickened. The pro- and metapleurse deeply excavated, the former 

 at the bottom and the latter at the apex striolated ; the mesopleura? punctured and 

 sparsely covered with white hair. Abdomen with scattered punctures, which become 

 stronger towards the apex ; the basal segment with a keel at the apex ; the suture on 

 the second segment wide and deep, crenulated at the sides ; the sides and the apices of 

 the fourth and fifth segments with long whitish hair ; the pygidium longitudinally 

 punctured, the apex reddish, covered with long pale hair ; the ventral segments closely 

 punctured, fringed with long pale hair. The tibiae on the outer- side and the tarsi 

 covered with glistening white hair ; the tibial spines black ; the calcaria and the tarsal 

 spines rufous ; the metatarsus with two stout black spines in the middle. Wings with 

 the nervures fuscous ; the first recurrent nervure received in the middle, the second 

 shortly beyond the middle of the cellule ; from the base of the radial nervure issues a 

 short nervure, as in Epomidiopteron, but it is not so long ; the costal cellule is pure 

 hyaline, and there is a hyaline cloud in the first cubital cellule. 



Characteristic of this species is the broken first transverse cubital nervure. The 

 abdomen and the keels of the median segment are formed as in Tiphia. 



B. The basal segment of the abdomen earinate on the top at the base. 



(Species 10 and 11.) 



10. Tiphia carinata. 



Long. 12 millim. 



Hab. Mexico, Chilpancingo 4600 feet, Tierra Colorada 2000 feet, both in Guerrero 

 (H. H. Smith). 



Head rather strongly punctured, the punctures not confluent; the clypeus less 

 strongly punctured ; the front ocellus in a pit ; the hair very sparse and short. The 

 scape of the antennae with large punctures, the lower side with long pale fulvous hair ; 

 the flagellum densely covered with pale fulvous pubescence. The pronotum strongly 

 punctured, except a broad semicircular band at the apex ; the centre of the meso- 

 notum strongly punctured ; the scutellum with a row of large punctures round the 

 edges ; the postscutellum less strongly punctured than the pronotum ; the median 

 segment shagreened, the apex on either side of the keels crenulated, the lateral keels 

 straight, slightly converging towards the apex, the central keel irregular. The pro- 

 pleurse with some punctures in front, the bottom striolate ; the mesopleuree strongly 



