16 PROCEEDINGS OF THE NATIONAL MUSEUM. 



ing of a pair of scarcely projecting rather distant rounded lobes; cerci 

 styliform, slender, gently tapering to a rather blunt point, conical, 

 straight or feebly incurved apically, fully as long as the plate; infra- 

 cereal plate slightly developed, concealed when the cerci are appressed. 



Length of body, male, 13 mm., female, 19.75 mm.; antennae, male, 

 5.75 mm., female, 6.5-f rnm.; hind femora, male, 7 mm., female, 9.5 mm. 



One male, one female. Jacksonville, Duval County, Florida, Ash- 

 mead (L. Bruuer; U.S.N.M. [No. 701J). 



2. NETROSOMA, new genus. 

 (njrpov, a spindle ; d&ita, body.) 



Body subfusiform, especially in the female, compressed cylindrical, 

 glabrous but very sparsely pilose. Head not prominent, the genae 

 tumescent, the vertex considerably arched, slightly elevated above the 

 level of the pronotum, the fastigium very narrow in the male, rather 

 narrow in the female, gently descending, deeply sulcate, the face retreat- 

 ing somewhat, particularly in the male; eyes rather prominent, broad 

 oval, half as long again as the infraocular portion of the genae, at 

 least in the male; frontal costa rather prominent and narrowed above, 

 below moderately broad, at least as broad as (female) or distinctly 

 broader than (male) the interspace between the eyes, with the face 

 feebly punctate; antennae with the apical joints depressed, fully half 

 (male) or a little less than half (female) as long as the body. Prono- 

 tum enlarging considerably and regularly backward, compressed cylin- 

 drical, the dorsum well arched transversely, passing quite insensibly 

 into the vertical lateral lobes, with the feeblest possible signs of a 

 median carina, both front and hind margins truncate, the sparsely but 

 distinctly and finely punctate prozona about twice as long as the simi- 

 larly but more densely punctate inetazona, the transverse sulci oblit- 

 erated on the dorsum. Prosternal spine erect, conical, in the female 

 appressed; interval between mesosternal lobes transverse, as broad as 

 or broader than the lobes in both sexes, the rnetasternal lobes subat- 

 tingent (male) or approximate (female). Teginma lateral and linear, 

 shorter than the pronotum, or wanting. Fore and middle femora of 

 male not at all tumid; hind femora short but not very stout, the hind 

 tibiae with eight spines in the outer series. Extremity of male abdo- 

 men feebly clavate and a little upturned, the subgenital plate with lat- 

 eral margins straight from the very base, with a slight tubercle at tip 

 which scarcely surpasses the supraanal plate; cerci laminate, of mod- 

 erate breadth, inferiorly acuminate and turned downward at tip; 

 furcula wanting. 



Two species are known, both from Mexico. 



N.fmiformis may be regarded as the type. 



