NEW SPIDER WASPS — DREISBACH 173 



rim, the apex converging, 0.8 the length of base, 2.4 as broad as long; 

 head 1.3 as broad as long; ratio of lengths of third and fourth antennal 

 joints is 7:7; upper interocular distance (12) is equal to the lower; 

 parameres not exceptionally wide with a rather narrow depression 

 on outside at basal third; volsellae with a U-shaped opening at apex, 

 very few hairs on inside and short hardly longer than aedeagus; 

 subgenital plate with the basal triangular area extending bej^ond 

 middle of plate, a narrow ridge extending from apex of triangle to 

 apex of plate. 



Length head and thorax 3.4 mm., abdomen 3.4 mm., forewing 

 5.3 mm., rear wing 3.6 mm.; length genitalia 0.33 mm., width 0.27 

 mm., length subgenital plate (and stem) 0.8 mm., width 0.33 mm. 



Holotype male: 1, Arraijan, Pro v. Panama, Panama, May 13, 

 1923, F. S. Blanton (USNM). 



Paratypes: Acayucan, Vera Cruz, Mexico, Oct. 23, 1957, R. and 

 K. Dreisbach (RRD); male, Palameres, Oaxaca, Mexico, Sept. 5-21. 

 1961, R. and K. Dreisbach (RRD). 



36. Aiiplopus abnormalis, new species 



FiGUBES 12, 13 



Holotype male. Head and thorax black, only very faintest 

 gi-eenish tinge; dorsum of pronotum and mesonotum metallic greenish, 

 postscutellum and dorsum of propodeum bluish gi^een, the scutellum 

 black, sides of thorax brown (slightly reddish tint) and the sides of 

 pronotum reddish; abdomen black with the apex of first tergite 

 slightly yello^vish; all coxae, trochanters, femora, and tibiae reddish 

 yellow; forebasitarsi yellow, all the rest of tarsi dark; antennae 

 yellowish beneath, except last three joints blackish, brown above; 

 antennal joints cylindrical, except the apical three joints are 

 abnormal (hence the name), they are broader than the rest and very 

 flat, thin, and concave on surface; head and thorax with a delicate 

 silvery pubescence; clypeus converging to apex, 0.8 as wide across 

 apex as base, the apex wavy, a slight concavity each side of middle; 

 clypeus 1.6 as broad as long; ratio of lengths of third and fourth 

 antennal joints is 8:7; head 1.2 as broad as long; upper interocular 

 distance (10) equal to lower; parameres more slender than usual, 

 volsellae a little wider than usual; the groove on outside of parameres 

 near base narrower and shallower; subgenital plate with the basal 

 triangular surface extending to apical 0.75 of plate before closing, 

 ridge sharp from there to apex. 



Length head and thorax 3.3 mm., abdomen 4.0 mm., forewings 

 6.0 mm., rear wing 3.6 mm.; genitaha length 0.8 mm., width 0.33 

 mm., subgenital plate length 0.33 mm., width 0.26 mm. 



