96 Psyche [June 



face yellow immediately below the antennae, then with a narrow black band, below 

 which is a wider pure-white band, below this again black, which extends to the 

 bucca in less intensity; two small pairs of verticals; one of frontals, close to orbit 

 and above middle of front; ocellars minute; vibrissse distinct. 



Mesonotum shining brownish-black; pleurae with wide wliite stripe on upper 

 part, a black one below this, and the lowest part yellow; scutellum pure-white, 

 somewhat swollen, with one pair of divergent, ascending bristles; the remainder of 

 the thoracic chsetotaxy cannot be distinguished in the specimen, and the halteres 

 are wanting. 



Abdomen yellow with black bands, but not in condition to describe more fully. 



Legs yellow, slender. 



Wings hyaline, venation as in heaia. 



Length, 1.2 mm.; of wing, 1.6 mm. 



One male, Peru, 1914, collected by H. A. Parish. 



TABLE OF SPECIES OF SIGALOESSA. 



Mesonotum yellowish-red (D. C, N. H., Fla., Kans.) flavcola Coq. 



Mesonotum shining black: 



Mesopleura with black stripe close up against notopleural suture (Potlatch, 



Ida.) lineata sp. nov. 



Mesopleura with black stripe on lower edge: 



Front with two narrow silvery stripes on upper half (Peru) . . . .frontalis sp. nov. 



Front without such stripes (Cuba, Porto Rico) bicolor Lw. 



Mesopleura without stripe (Potlatch, Ida.) hirta sp. nov. 



Sigaloessa lineata sp, nov. 



cf . Front wider than one eye, brown above, gi-adually yellower fon\ard, with a 



large indistinct yellow crescent above the antennae (not the true lunule, but above 



it); antennae small, brownish-yellow, 



partly concealed by the overhang of 



the front; third joint rounded, arista 



black with microscopic pubescence; 



face wide, rather excavated under the 



antennae, lower part white with a 



narrow jet-black band along edge of 



r,. J ,. . mouth; palpi, proboscis and bucca 



Fig. 2. Sigaloessa hneaia, sp. nov., wing n ., i t- • 



° " t I yellow, the same color contmuing up 



the posterior orbits; a few hairs on 

 sides of epistoma, but no distinct \A- 

 brissae; ocellar triangle blackish with almost imperceptible bristles; two pairs of ver- 

 ticals, the inner smaller; front with minute scattered hairs. 



Mesonotum shining black, yellow all round the edge except in front, between the 

 humeri; pleurae yellow, a black stripe just below the notopleural suture, a spot on 

 sternopleura and another behind it; scutellum yellow; metanotum yellow above, 

 black below; halteres yellow with a black knob. Dorsocentrals two, with a row of 

 fine hairs extending forward from them; acrostichals also in the form of a single 



