90 INSECUTOR INSCITl/E MENSTRUUS 



with a faint brassy-cinereous pollen ; thoracic scutum with the four faintly 

 defined vittae narrow. Abdomen and legs wholly pale reddish, the legs 

 being of a somewhat lighter shade. Wings wholly infuscate, both scales 

 of teguiae snow-white ; alulae wholly smoky like rest of wings. 



This is another generically distinct form with same habitus and colora- 

 tion as Corpulentosoma comutum and Eucorpulentosoma simile. 



Echinopyrrhosia, new genus. 



Closely allied to Oestrohystricia, from which it differs as follows: 

 Body very broad, especially abdomai. Femde front at vertex one and 

 one-half times width of one eye. Plane of lower half of facial plate 

 (epistoma) directed anteriorly downward at an angle of 45° or eJmost 

 straight forward at right angle from that of upper half (clypeus). Third 

 antennal joint either shorter or longer than second, the second moderately 

 to very elongate ; arista thickened nearly to tip. Parafacials longer than 

 wide to subquadrilateral. No ocellar bristles, but only a bunch of fine 

 long hairs of equal strength and about same as hairs of parafronteJs and 

 parafacials. FemeJe eyes quite thickly long-hairy. Part of proboscis 

 beyond geniculatlon from less to more than head-height. Palpi as long 

 as second antennal joint or shorter, filiform. 



Three or four sternopleural bristles, rarely a fifth one ; three or four, 

 rarely five, postsuturals. No median pair of spinelike macrochaetae close ' 

 to hind margin of mesoscutum. Scutellum not so shortened, but rather] 

 over twice as wide as long. Less to rather more than median one-third 

 of dorsum of second abdominal segment with short erect to suberect^ 

 spines. Hind margin of second segment with dense row of 20 or more] 

 spines. Nearly posterior one-half to about one-third of disk of anal seg- 

 ment with spines, the segment straight to faintly emarginate behind. 

 Fourth vein bent at right to acute angle, or continued in very short stump 

 abnormally. Hind cross vein nearly straight, subsinuale, or abruptly bent] 

 in anteriorly. All tarsi of female broad, front ones more so. 



MeJe eyes still more thickly hairy, vertex equal to width of one eye,] 

 no orbital bristles, abdomen subemarginate at tip, none of tarsi broad- 

 ened, otherwise practically as in female ; even claws no longer than in ] 

 female, and antennae same in both sexes. 



Reproductive habit, larviposition of grayish colored maggots. 



Tppe, Echinopyrrhosia alpina, new species. 



