■ Pomona Coi-lkck Journat. or* ENToMor.o(;v 441 



peculiar birostrate a])pcarance ; basal segment of antennae large and broad ; 

 second segment large, but smaller than first ; third segment very long. Facial 

 cones entirely wanting; face slightly swollen under insertion of antennae. 



This genus is very closely related, apparently, to the European genus 

 Bactericcra I'uton. and in fact may be identical. The absence of the facial 

 cones and the unusual Icn.nth of the third antennal segment ally tin- two 

 genera very closely. Low's description of Bactericera gives as characters of 

 the vertex: "Vertex half as long as width between eyes; with two flat. Inroad 

 impressions, rounded anteriorly and extending well forward ; emarginate at 

 median suture; posteriorly almost jilane." It is quite proljalile tiiat in the 

 formation of the head the two genera are closely related. Until the European 

 form becomes available for study, we should allow RhinopsyJla to stand as a 

 very closely allied genus. The genus Bactericcra can scarcely be erected into 

 a subfamily, as distinct from 'l'rio::inac, as has been attempted by some, since 

 there is too close a relationship existing between them. 



Synopsis of the Genus Rhinopsylla 



A. Fore femora distinctly enlarged, compressed, and curvetl. Tiiird antennal 



segment thicker midway than succeding segments. Wings slender, more 



than three times as long as broad. Rh. sclti^'arzii Riley. 



AA. Fore femora not distinctly enlarged, compressed nor curved. Third 



antennal segment slender, not thicker than succeeding segments. Wings 



only two and a half times as long as broad. 



i). Birostrate appearance of head very pronounced ; basal segments of 



antennae almost as broad as ends of projecting rostra. Body black. 



7?/;. aiitciinata Crawf. 



BB. Birostrate appearance less pronounced ; basal antennal segments 



smaller ; sulcate impressions of vertex more pronounced. Body orange. 



Rh. anfcunata l^ro.viina Crawf. 



Rhinopsylla schwarzii Riley 

 Proceedings of the Biological Society of \\'ashington. Vol. II. 1882-84, 

 page 77. 



Rhinopsylla antennata (Crawf.) 



( Syn. Paratrioza aiitciiiiata Crawf.) 



(Fig. 153, C, D, U; 155, S) 



Length of body 1.8 mm.; length of forewing 2.7 mm.; greatest width 1.1 



mm. ; width of vertex between .44 mm. ; with eyes .73 mm. General color 



black ; abdomen white ventrad ; antennas and tarsi lighter. 



Head not deflexed, with eyes about as broad as thorax, impunctate ; broad 

 posteriorly, when viewed laterally, and tapering toward insertion of antennae. 

 Posterior margin of vertex arcuate, scarcely elevated narrowly ; vertex not 

 raised plate-like ; discal area with a distinct sulcate impression extending for- 

 ward and toward lower margin of eye on each side, anterior margin deeply 

 ?marginate at median suture, making head appear strongly birostrate. An- 



