March 1S93.] 



PSYCHE. 



421 



original figure, but Walker's diagnosis is no 

 different. 



Orgyia sp. Packard. 



1890, Packard, 5th rept. U. S. ent. comm., 



P- 774- 



Dr. Packard describes a larva appearing 

 much like O. antiqua, but says: "It differs 

 from O. leucostigma in having a pair of large 

 prothoracic lateral black pencils" [besides 

 the usual subdorsal ones?] and there are 

 "three coral retractile warts." I would like 

 to call particular attention to this form. It 

 evidently differs structurally from any of the 

 known North American Orgyia in having 

 three instead of two retractile tubercles, 

 besides apparently having two pairs of hair 

 pencils on joint 2. It must be an undescribed 

 species. The larvae were found on pine. 



The following table will serve to distinguish 

 the mature larvae of Orgyia. 



Head red. 



Warts pale yellow leucostigma S. & A. 

 Warts orange .... inornata Beut. 



Head yellow definita Pack. 



Head black. 



Without lateral tufts on joints 5 and 6. 

 Pencil on joint 12 yellow, tufted with 



black vetusta Boisd. 



Pencil on joint 12 black, perhaps 

 preceded by brown. 



Three yellow lines on each side 

 gulosa Hy. Ed. 

 Two yellow lines on each side. 

 Warts bright crimson 



cana Hy Ed. 

 Warts orange or yellowish 

 badia Hy Ed. 

 With lateral tufts on joints 5 and 6. 



Two retractile tubercles antiqua L. 

 Three retractile tubercles sp. Pack. 



SYNOPSIS OF THE N. AMERICAN SPECIES OF MEGACILISSA. 



BY WM. J. FOX, PHILADELPHIA. 



Labrum biridged, or strongly furrowed down 

 the middle. 

 Wings not or but slightly fuscous apically. 

 Abdomen dorsally, with exception of first 

 segment entirely black, with black 

 pubescence. . . electa Cr. £ ■ 



Abdomen dorsally black, with the apical 

 margins of segments 2-4 with white 

 pubescence. . Tarrowi Cr. $ $. 

 Abdomen greenish, without white fas- 

 ciae. . . mexicana Cr. $ . 

 Wings on apical half blue-black; legs red- 

 dish ; abdomen black, on the sides, 

 beneath and the sixth and seventh 

 dorsal segments with fulvous pubes- 

 cence. . . . gloriosa n. sp. 

 Labrum not ridged or furrowed, at the most 

 swollen basally ; abdomen fasciate ; 

 legs brownish, with brownish pubes- 

 cence ; wings with a yellow tinge 

 eximia Sm. $ ■ 



Megacilissa gloriosa $. — Labrum with a 

 long, narrow, medial furrow; clypeus with 

 strong, close punctures, those in the middle 

 confluent and forming transverse rugae; 

 ocelli situated very low down, the anterior 

 one separated but little from the hind margins 

 of the clypeus and is connected with it by 

 a furrow; vertex and cheeks with rather fine, 

 close punctures, those on the cheeks finest 

 and sparsest ; first joint of fiagellum fully as 

 long or a little longer than the following five 

 joints united, joints 2-5 shortest and about 

 equal in length; tarsal claws armed with a 

 long, acute tooth, in shape somewhat similar 

 to the claw itself; dorsal abdominal segment 

 finely and closely punctured, except apical 

 portion of segments 1-4, which is depressed 

 and impunctate; enclosure on last dorsal 

 segment strongly furrowed along the lateral 

 borders. Black ; tegulae and legs, except the 

 four anterior femora in pari. Ferruginous; 



