Die Hymenopteren-Gruppe der Evaniiden. III. 535 



Aulacus pacißcus Cress. 



Aulacus pacificus Cr es s., Trans. Amer. Ent. Soc. Philad., T. VII, p. 256, 9 J 879 



9. Black; head long behind cyes, but narrowed to posterior margin, face finely 

 roughened, vertex and oeeiput smooth; mouth sometimes more or less dull yellowish; 

 antennae nearly as Long as body, scape sometimes dull yellowish beneath; mesothorax 

 transverselv aciculated, sometimes obsolctely so, middle lobe scarcely gibbous, rounded 

 in prorile, and longitudinally grooved above anteriorly; tegulae dull yellowish; wings 

 hyaline, tinged with yellowish, a small fuliginous spot beneath Stigma; legs pale ferru- 

 ginous, inclining to dull yellow, coxae and trochanter black, posterior femora and tibiae 

 sometimes more or less fuscous; abdomen about as long as head and thorax, slcnder at 

 base, polished, ferruginous, rirst segment at base, a broad band at tip, and disk of remain- 

 ing segments more or less, black; ovipositor longer than body. Length 5o — 55 inch. 

 Four speeimens*« Cress. 

 Subreg. 1. 

 Vancouvers Island. 



Aulacus rußtarsis Cress. 



A ulacus rufitarsis Cress., Proc. Ent. Soc. Philad., T. III, p. 134, 9 1864 



Aulacus abdominalis Cress., Trans. Amer. Ent. Soc. Philad., T. VIII, p. V, $ 1880 



?Aulacus editus Cress., Trans. Amer. Ent. Soc. Philad., T. VIII, p. V, $ 1) 1880 



Aulacus rußtarsis P rovanch., Pet. F"aun. Ent. Canad., p. 751, 9 1883 



Aulacus bilobatus Pro vanch., Pet. Eaun. Ent. Canad., p. 247, tf 1883 



cT, 9. L. 8 — 12 mm. Caput post ocellos nitidum, tenuissime ruguloso-punctula- 

 tum, ante ocellos opacum, tenuiter rugoso-punetatum. Genae quam antennarum scapus 

 fere duplo longiores. Scapus quam articulus sequens fere duplo longior; flagelli arti- 

 culus seeundus quam primus in cT triplo, in 9 vix duplo et dimidio (2*5) longior, tertius 

 quam seeundus unacum primo in cT paullo, in 9 multo longior (Tab. XXII, Fig. 146 a 

 und b). Margo occipitalis posticus simplex. 



Mesonoti media pars grosse transverso-striata, triangulari-cordiformis, margine 

 antico acuto, in medio impressa. Scutellum evidenter transverso-striatum. Coxae poste- 

 riores coriaeeo-rugosae. Abdomen fortiter clavatum, petiolo sublongo. Terebra circitcr 

 corporis totius longitudine, valvulis omnino nigris. 



Alae omnino hyalinae; alae anticae cellulae discoidalis prima et cubitalis seeunda in 

 d" vena interposita exigua separatae, in 9 se attingunt. Niger, pedibus apicem versus 

 abdomineque rufescentibus. 



cT, 9. Kopf zwischen den Nebenaugen und dem Fühlergrunde glanzlos und fein 

 runzelig punktirt. Schläfen stark glänzend und seicht zerstreut punktirt. Hinterkopf 

 glänzend und sehr seicht runzelig punktirt. Wangen fast doppelt so lang wie der Fühler- 

 schaft; dieser fast doppelt so lang wie das erste Geisselglied. Zweites Geisselglied bei dem 

 Männchen dreimal, bei dem Weibchen nicht ganz 2*5 mal so lang wie das erste, drittes 

 Geisselglied bei dem Männchen ein wenig länger als die zwei vorhergehenden Geissel- 



') » 9- Black; head subglobose, broad behind the eyes, cheeks and back of ocelli smooth and shin- 

 ing, face pubescent, vertex beneath ocelli feebly punetured; palpi pale, except base; antennae rather 

 longer than head and thorax, scape sometimes ferruginous beneath; thorax above coarsely transversely 

 wrinkled; mesothorax subpyramidal in prohle, anterior and lateral margins of middle lobe acutely carinate 

 especially at angles broadly rather deeply emarginate medially ; wings hyaline, stained with dusky yellow, 

 nervures and stigma black; legs ferruginous, tarsi sometimes yellowish, coxae and trochanters black, 

 posterior femora sometimes tinged with fuscous; abdomen as long as head thorax, ferruginous except base 

 of rirst segment; ovipositor as long as body. Length 55 inch. Hab. Nevada, California.« Cress. 



