318 A. L. MELANDER. 



4 

 stern urn roughened except medially and with two sharp but small dentiform 

 projections rather near the hind portion. Petiole of abdomen as wide as long 

 and twice as wide at tip as at base, its sides nearly straight, basal angles denti- 

 form, above lightly convex, impunctate, not constricted behind, but nearly sessile 

 with the impunctate second segment; remainder of abdomen impunctate but less 

 shining; pygidium narrow, very finely aciculate. Legs short, slender, pale yel- 

 low, the joints and the tibial spurs testaceous. Wings hyaline, veins pale yellow, 

 stigma brownish, third submarginal wanting, second receiving the recurrent 

 nervure at its basal third. 



Length, 6.25 mm. 



Fig. 51 ; mesosternum. 



One male. Las Cruces, New Mexico, Cockerell, No. 2335. Col- 

 lected by Prof. E. O. Wooten. Type in National Museum. 



83. Iflutilla pallida Blake (145). 



The indefinite locality Texas given at Cambridge. 



84. * Iflutilla alemon Fox (147). 



Three specimens from Texas, one from Austin, the others without 

 definite locality label (M. C. Z.) ; and three from New Mexico 

 (Saint Augustine, Las Cruces and Arrogo ; Cockerell), appear to 

 belong to this species. The differences are of minor importance, 

 but may be noted : legs sometimes false fuscous, the femora and 

 tibiae and the antennse darker fuscous. The basal area of the meta- 

 thorax is much shortened ; the apical margins of the abdominal 

 segments not distinctly fringed, the hair somewhat soiled. 



85. Iflutilla aeon tins Fox (148). 



Four specimens, collected by Mr. Townsend, at light, in the 

 Organ Mountains, New Mexico, about 5300 feet altitude, September 

 4th. These have comparatively long pubescence, and the reticulum 

 of the metathorax is of large though shallow mesh. But two sub- 

 marginal cells are present. 



86. Iflutilla noctivaga sp. nov. 



Male. Eobust, testaceo-rufous, completely clothed with fine, short, sparse, 

 whitish hairs; head broad, sparsely punctured, humeri prominent, mesonotum 

 closely and deeply punctured, mesosternum unarmed, metathorax reticulate, 

 devoid of the two usual basal areas ; first segment of abdomen very broadly sessile 

 with the second, finely punctulate, second segment rather closely punctured ; 

 wings subhyaline, two submarginals. 



Head considerably broader than long, broadly rounded and truncate behind, 

 provided with fine scattered punctures, ocelli moderate, the hind ones as far from 

 each other as from the eyes; a deep puncture but no furrow midway between 

 the antennse and the front ocellus; antennse concolorous, the scape finely and 

 densely puuctulate; mandibles with tip blackened and with the basal tubercle 



