26 ALASKA INSECTS 



lugubris Staud. being the most abundant. Several specimens 

 of this moth were captured with the pollinia of Habenaria cling- 

 ing to their heads. The remaining moths were three Pyralidce, 

 two Tortricidae, and a representative of the Sesiidas, Sesia culici- 

 fonnis L. 



The collection of Hymenoptera contained an interesting series. 

 There were three species of bumble-bees Bombus frigidus 

 Smith, B. sitkensis NyL, and B. juxtns Cr. The Vespoidea 

 were better represented than at any other locality visited by the 

 Expedition, examples of three families being taken, as follows 

 Pompilidos : ArachnophiJa se-ptentrionalis sp. nov. Kincaid 

 (at umbels of Heraclcimi] ; Vespidos : Vcspa marginata Kirby ; 

 Eumenidae : Odynerus albophalcratus Sauss. (also at flowers of 

 Ilcracleum}. The Sphecoidea were represented by a Crabronid, 

 TJiyrcopus vicinus (Cr.), taken at the same blossoms. 



The Tenthredinoidea included seventeen species, of which 

 two-thirds were new. The list comprises representatives of the 

 genera Fcnusa; Paraselandria ; Pachynematus (two species); 

 Pristiphora (three species); Pontania (two species); DoJcrns ; 

 Emphytiis; Trichiosoma (T. triangulum') ; and Tcnthrcdo (five 

 species T. fcrrugincipcs Cr., T. varipicta Nort., T. nigri- 

 collis Kirby, T. erythromera Prov., and T. dissimulans sp. nov. 

 Kincaid). 



The list of parasitic Hymenoptera as determined by Mr. 

 Ashmead comprises 21 species, of which 15 were new, includ- 

 ing a new genus (Harrimanielld). 



Of Diptera 68 species were captured. As usual the Empidae 

 and Syrphidae were well represented, the former by 9, the latter 

 by 14 species. In these families the more interesting captures 

 were Empis poplitea sp. nov. Coq., Hilara anrata sp. nov. 

 Coq., Hilara quadrivittata Meigen (a European species not 

 previously recorded from America), CJu'Iosia puhhripcs Loew, 

 Platychirus tenebrosus sp. nov. Coq., Syrphus torvus O. S., 

 Syrphus geniculata Macq., and VoJuccJJa facialis Will. 



Perhaps the most striking feature in the Diptera collected at 

 this point was the surprising number of Dolichopodida;, nine 

 species in all, including two not found at any of the other 

 stations Dolichopus Job at us Loew and Porphyrops consobrinus 



