i84 HOMOPTERA 



notched. Tegmina pellucid; entirely exposed; base narrowly coriaceous and punctate; veins strong 

 and colored ; five apical and two discoidal cells, the outer discoidal cell stylate; tips rounded; apical 

 hmbus broad. Legs simple; hind tarsi longest. 



Type gilvipes Stal. 



Geographical distribution : The type species has been reported from Mexico and from 

 Central America. 



I. gilvipes Stal, Bid. Memb. Kan. 290. i (i86g). — Pl. I 0,fig. 146. Mexico, Honduras, Yucatan. 



169. GENUS SPATHOCENTRUS FOWLER 



Spathocentrus Fowler, B. C. A. II : i53 (1896). 



Characters : The single species which represents this genus has, so far as we know, never been 

 recognized since its original description. However, Fowler's description and his three excellent figures 

 seem to leave no doubt but that the genus is valid and we are so recognizing it. From the original 

 description and figures, the generic characters may be given as foUows : Head subquadrate, broader 

 than high; base arcuate and strongly sinuate; eyes globular; ocelli prominent, farther from each other 

 than from the eyes and situated about on a line drawn through centers of eyes; inferior margins of genas 

 rounded ; clypeus projecting for two thirds its length below inferior margins of genae, tip rounded. Pro- 

 notum convex with strong suprahumerals; metopidium nearly vertical, about as broad as high; median 

 carina percurrent; humeral angles strong, blunt; suprahumerals as long as the distance between their 

 bases, projecting directly outward ; posterior process elevated above scutellum, tip dilated and spatulate, 

 not reaching beyond the internal angles of the tegmina. Tegmina hyaline; base broadly coriaceous and 

 punctate; tip rounded; five apical and two discoidal cells; exterior discoidal cell truncate at base; apical 

 Hmbus broad. Legs simple; all tarsi about equal in length. 



Type intermedius Fowler. 



Geographical distribution : The genus is known only from a single species from Mexico. 

 I. intermedius Fowler, B. C. A. H : i53. i (1869). Mexico. 



170. GENUS ISCHNOCENTRUS STAL 



Ischnocentrus Stal, Bid. Memb. Kan. 292 (1869). 



Characters : Small, inconspicuous insects without suprahumerals and with a slender posterior 

 process high above the scutellum. Head subquadrate, broader than high ; base arcuate; eyes large and 

 globular ; ocelli large, prominent, twice as far from each other as from the eyes and situated well above 

 a line drawn through centers of eyes; inferior margins of genas sinuate ; clypeus projecting for two-thirds 

 its length below infenor margins of gens. Pronotum convex, without suprahumeral horns; metopidium 

 sloping, broader than high; median carina obsolete; humeral angles strong, triangular, blunt; posterior 

 process slender, spine-like, short, arising from high on the dorsum, far above the scutellum and not 

 reaching the internal angles of the tegmina; scutellum entirely exposed, triangular, longer than wide. 

 base swollen and tomentose, tip deeply notched. Tegmina hyaline; base broadly coriaceous and 

 punctate; five apical and two discoidal cells; exterior discoidal cell truncate at base; apical limbus 

 nanow. Legs simple; all tarsi about equal in length. 



