240 PROCEEDINGS OF THE ACADEMY OP 



9th Section. 



(Subgenus Dae tylolabis nob.) 



Body moderately stout, feet long, slender ; proboscis a little elongated, al- 

 though much shorter than the head ; palpi elongated. Antennae not reaching 

 much beyond the base of the wing ; first joint long, cylindrical ; second short ; 

 the following elliptical, clothed in the $ with a dense microscopic pubescence, 

 besides the short, bristle-like verticils. $ forceps with elongated, soft, digiti- 

 form appendages, which do not overlap in repose. (Pig. 28, forceps of L. 

 m o nt an a in repose ; fig. 28a the same, from the side.) 9 ovipositor with 

 short, lamelliform, slightly curved valves. 



L. m o n t a n a. Thorace cinereo ; vittis quatuor f uscis ; alarum margine 

 anteriore maculis quinque fuscis, media in fasciam, usque ad venam pobra- 

 chialem, extensa ; long. lin. S^-A. 



Head cinereous ; proboscis, palpi and antennse brown ; four basal joints of 

 the latter cinereous. Praescutum cinereous with four brown stripes ; the in- 

 termediate ones nearly reach the collare ; the lateral ones extend over the 

 scutum ; pleurae hoary ; scutellum and metathorax hoary-brown ; poisers 

 pale ; feet dark tawny ; tips of femora and tibiae darker ; tarsi brown. Abdo- 

 men brownish ; margins of segments paler ; 9 ovipositor ferruginous (see 

 above, for details about the tf and 9 genitals.) Wings with five brown spots 

 on the anterior margin ; the third one is prolonged in a band across the central 

 cross-veins, as far as the pobrachial vein ; the fifth nearest to the tip of the 

 wing, is very small ; the lower discal cross-veins and origin of the petiolated 

 areolet are also spotted ; veins brown, naked ; subcostal pale. 



Common in Washington in April and May, in dry, rocky localities. Mass. 

 (Mr. Scudder.) Illinois (Mr. Kennicott.) 



Compared 19 rj 1 9 specimens. 



In some specimens the spots on the wings are much larger than in others 

 the stripes on the thorax are also more or less distinct. 



10th Section. 



(Subgenus Die ranophragm a nob.) 



Wings broad, posterior margin rounded; a supplementary cross-vein unites both 

 branches of the radial fork near their tip. Antennne hardly reaching the base of 

 the wings ; basal joint long, cylindrical : the second stout, rounded ; the fol- 

 lowing joints short, subglobular, becoming more elongated and slender to- 

 wards the tip of the antennae ; verticils moderately long ; the fourth and fifth 

 basal joints of the flagellum are densely pubescent on the under side of 

 the J*. 



L. fuscovaria. Antennis basi pallidis ; thorace cinereo, fusco-variegato ; 

 pedibus pallidis ; alis fusco-variegatis ; long. lin. 2^-3. 



Head cinereous, proboscis and palpi brown ; antennae pale at base, darker 

 towards the tip, with moderate verticils. Thorax cinereous with three narrow 

 brown stripes ; the intermediate one, which is paler, ends in two black dots 

 near the collare ; pleurae with two brown stripes ; one begins at the collare : 

 the other at the fore coxae ; both running backwards ; brown spots near and 

 on the coxae ; scutellum cinereous with two, sometimes indistiuct, brown 

 spots; metathorax cinereous, its latter half brown; halteres pale, with the 

 tip slightly dusky ; feet pale, clothed with hair ; tip of the tarsi a little darker. 

 Abdomen . brown, paler at the incisures ; lateral margins darker ; tf forceps 

 pale ; tf ovipositor ferruginous, long, slender, nearly straight. Wings varie- 

 gated with numerous little round, brown dots ; five larger, nearly square spots 

 along the anterior margin ; the first a little beyond the humeral veinlet ; the 

 second at the origin of the petiole ; the third on the central cross-veins, de- 

 scending nearly to the discal areolet ; the fourth at the tip of the subcostal 



[Aug. 



