526 PROCEEDINGS OF THE NATIONAL MTSEUM vol. 93 



Tetrastichus tatei Dozier, Journ. Agr. Univ. Puerto Rico, vol. 21, p. 129, 1937. 

 (New synonymy.) 



Dull brown, with antennae, urea of head around mouthparts, tegu- 

 lae, entire front and middle femora and apices of hind femora, tibiae, 

 basal segments of tarsi, and base of gaster light yellow or white. 



Ft male. — Length, 1.0-1.1 mm. Antennae inserted at level of 

 ventral margins of compound eyes; margin of ventral tooth of 

 mandible minutely serrulate: apex of antennal scape not quite reach- 

 ing level of anterior ocellus; pedicel and second and third funicle 

 segments equal in length, first segment slightly shorter than second, 

 club wider than funicle and almost as long as it; postocellar line one 

 and one-half times as long as ocellocular; area of Irons laterad and 

 dorsad of scrobe cavity with well-marked, transverse reticulations. 

 Mesopraescutum bearing two bristles at each lateral margin: sub- 

 marginal vein of forewing with two dorsal bristles; apex of hind- 

 wing acute, fringe at posterior margin two-thirds as wide as wing 

 at hamuli. Surface of propodeum smooth, median and paraspiracu- 

 lar carinae absent; mesal length of propodeum two and one-third 

 times as great as mesal length of metanotum, and two-thirds as long 

 as mesoscutellum ; propodeal spiracles contiguous with anterior 

 margin; gaster narrow, blunt at apex, and as long as thorax; apex 

 of ovipositor sheaths not quite reaching apex of abdomen, sheaths 

 enlarged, and bearing only four or five bristles. 



Male. — Unknown . 



Type locality. — Trinidad, British West Indies. 



Type. — One female specimen in the British Museum. 



Hosts. — Prepupae of thrips, Liothrips laureli (Mason), Li-oth/ips 

 urichi Karny, Gynaikothrips uzeli (Zimmerman). 



Distribution. — Florida; Puerto Rico; Trinidad, British West In- 

 dies; Fiji. 



Remarks. — Waterston's excellent description makes it possible to 

 identify with certainty this distinctive species without examining the 

 type. 



TETRASTICHUS JOHNSONI Ashmead 

 Figure 20, a 



Tetrastichus johnsoni Ashmead, Trans. Amer. Ent. Soc, vol. 23. p. 233, 1896. — 

 Fkison, Bull. Illinois Nat. Hist. Surv., vol. 16, p. 223, 1927. 



Aprostocetus johnsoni (Ashmead) Giratjlt, Societas Entomologica, vol. 31, p. 35, 

 191 G. 



\ cry dark brown or black, noniridescent ; scape and pedicel, apices 

 of coxae, trochanters, bases and apices of femora, tibiae, and basal 

 three segments of tarsi light yellow or white. 



Female. — Length, 1.1-1.2 mm. Antennae inserted at level of ventral 



