82 
bulletin 94. 
first segment with a pair of small reddish sublateral marks; apical plate 
narrow, truncate, with the faintest suggestion of an emargination; ven¬ 
ter yellow with blackish and reddish bands. 
This is possibly the of some described species, but after repeated 
comparisons, I cannot satisfactorily assign it to any. In my table in 
Proc. Acad. Nat. Sci. Phila., 1903, p. 559, it runs to pascoensis, which it 
superfiicially resembles, but it is easily known from that by the quite 
ordinary last antennal joint, the light marks on metathorax, etc. 
Somalia paiiitielSa, new species. 
One £ marked Colorado 566 (Montrose, June 24, 1902, C. P 
Gillette, collector). 
Length about 7~k mm.; black, marked with pale yellow; quite hairy. 
Facial quadrangle about square: labrum, mandibles except tips, narrow 
stripe beneath eyes, clypeus and lateral face-marks, yellow,lateral face- 
marks reduced to a triangle at lower corners of face, which sends a line 
upwards along orbital margin nearly to level of antennae; antennae long, 
scape ordinary, yellow in front; third joint much shorter than fourth; 
flagellum dark ferruginous, blackened above; mesothorax dull and very 
densely rugoso-punctate; tubercles, a small mark on anterior part of 
pleura, and two spots on scutellum, yellow or yellowish tinged with 
reddish; metathorax entirely black; hair of dorsum of thorax brownish; 
tegulae ferruginous, punctured; wings iridescent, dusky at tips; stigma 
ferruginous, nervures fuscous; second submarginal cell broad above, 
third greatly narrowed above; basal nervure meeting transverso-medial, 
but a little on the basad side; legs red without any yellow; basal half of 
anterior femora behind, most of basal two-thirds of middle femora be¬ 
hind and beneath, and all of the hind femora except apex, black; hind 
tibiae with a blackish dash on inner side; abdomen minutely roughened; 
light yellow bands on segments two to six not interrupted, but those on 
four and five enclosing laterally a dark spot; band on first segment with 
a rather broad median ferruginous interruption, the area posterior to the 
band also being ferruginous, with two blackish dots; otherwise, the dark 
parts of the abdomen are black or almost so; apex with long hairs; apical 
plate quite broad, deeply notched; venter red-brown, with yellow bands 
bent in the middle and not reaching the lateral margins. 
From Robertson’s N. scilicis and N. simplex (jj's) this is readily 
separated as follows: 
Apex of abdomen strongly notched. 1. 
Apex of abdomen slightly notched; scutellum black. simplex. 
1. Legs marked with yellow. salicis. 
Legs not marked with yellow. pallidella. 
The Californian N. subangustci , Okll., is very near to N. pallidella , 
but it has the first abdominal segment narrower; the abdomen, where not 
yellow, mainly red; the scutellum entirely black, the second submarginal 
cell narrower; and the red of the flagellum much brighter. In the face- 
marks, hairy thorax, etc., they agree. 
From N. modocorum, Ckll., N. pallidella is easily known by the 
much narrower, parallel-sided abdomen, with much paler markings, 
those of modocorum being bright yellow. 
rtocnada sayi, Robertson. 
One $ collected by E. S. G. Titus at Virginia Dale, Colorado, 
July 24, 1899, from wild geranium. The date seems too late for 
sayi, and the specimen is hardly typical; it is not N. lehighcnsis , 
which flies in July. Probably when we have a good series of the 
Colorado insect, including both sexes, it will be possible to separ¬ 
ate it subspecifically, at least. 
