272 The Ohio Journal of Science [Vol. XVIII, No. 7, 



Distinguished from Anteon by the fourth joint of the front tarsus, 

 which in the female is longer than the metatarsus, by the median chela 

 arm, which is provided ventrally with rows of lamellse and whose free 

 distal end is as long or longer than the basal. As in .-1 nteon the parapsidal 

 furrows are at least lacking behind, the eye is bare, the radius mostly 

 angled, the proximal part much longer than the distal. 



Key to Chelogynus. 



1. Wings hyaline 2 



Wings with one or two dark transversal bands 6 



2. Antennaj brown 3 



Antennae partly red or testaceous, at least the distal end black 4 



3. Pronotum longer than mesonotum and coarsely punctate 4. osborni 



Pronotum as long as the mesonotum and very finely punctate. . .3. canadeniss 



4. Only the end joint of the antennae black, the others testaceous 1. liisus 



Not only the end antennal joint black 5 



5. Coxas black for the greatest part, pronotum with rugulosities . . . .9. funestus 

 Coxae pale 2. melanacrias 



6. Wings with one dark band, head and thorax red 5. atriventris 



Wings with two dark bands 7 



7. Entirely ferruginous 6. ferrugineus 



Black 8 



8. Frons with three longitudinal ridges, sides of face reddish brown. .7. grandis 

 Frons without longitudinal ridge, face black 8. henshawi 



1. C. lusus Perkins. 



Rep. Exp. vSta. Hawaii, Ent. v. 2, Bull. 4, p. 50, (9 ), 1907. 



Female: Black, head and pronotum densely minutely shagreened, 

 mesonotum with fine surface sculpture, scutellum polished, propodeum 

 rugose, posteriorly dull, with very dense and fine rugulosity. Mandibles 

 white, antennae except apical joint concolorous and testaceous. 

 Length, 2 mm. 



Tucson, Arizona. Bred from jassid nymph. 



2. C. melanacrias Perkins. 



Rep. Exp. Sta. Hawaii, Ent. v. 2, Bull. 4, p. 49, (9 ), 1907. 



Female: Differs only from C. lusus in color and sculpture as follows: 

 antennae testaceous on basal joints, four apical joints black. Pronotum 

 somewhat transversely rugulose anteriorly. Length 2-2.5 mm. 



Nogales, Arizona. Collected. 



3. C. canadensis Ashmead. 



Bull. U. S. Mus., V. 45, p. 93, (9 j, 1893. 



Female: Black; head finely punctate, pronotum as long as meso- 

 notum very finely punctate, mesonotum and scutellum smooth, i)ro- 

 podeum rugose. Length, 2.5 mm. 



Ottawa, Canada. Collected. 



4. C. osborni n. sp. Plate I, Fig. 6. 



Female: Black, antennas brow^n, scape testaceous, flagellum brown 

 except third flagellar joint which is dark brown, legs testaceous except 

 middle and hind coxae and trochanters which are fuscous, and distal end 

 of hind femora which is darkened. Mandibles testaceous except teeth 



