1809] ENTOMOLOGICAL NEWS. <i7 



\ ein between the forked nervures, and since it agrees in every 

 essential generic character with Sycorax it has been referred 

 to that group, although a comparison with the European mate- 

 rial may necessitate the erection of a new genus for its recep- 

 tion. 



EXPLANATION OF PLATE. 



Figs, 1-11. Ventral plate of Psychodidae. (1.) Psychod<) 

 sigma, n. sp. (2.) Fericoma tridactyla, n. sp. (3.) Pericoma 

 olympia Kinc. (4.) PsycTioda pacifica Kinc. (5.) Psychoda 

 elegans Kinc. (6.) Pericoma triloba, n. sp. (7.) Pericoma 

 variegata, n. sp. (8.) Pericoma bipiinctata, n. sp. (9.) Peri- 

 f'oma xchizura, n. sp. (10.) Pericoma truncata, n. sp. (11.) 

 Sycorax lanceolata, n. »^. Fig. (12.) Wing of Sycorax lanceo- 

 lata, denuded of hair to show venation. (13.) Ventral plate of 

 Pericoma furcata. n. sp. 



o 



ON TWO NEW AND ONE PREVIOUSLY KNOWN FLEA. 



By C. F. Baker, Auburn, Ala. 



Pulex hoicardii Baker. In the group which includes this 

 flea and fasciatus and its allies, the males determine the spe- 

 cies. For this reason rricMami and giUetei are not well 

 founded. They were separated on characters whose values 

 could not have been correctly estimated at the time. They 

 should be reduced to synonyms of howardii. 

 Pulex irritans, var dugesii, n. var. 



Dr. Duges has ^ent n^e a flea taken on Spermophilus macrourus 

 at Guanajuato, Mex., which agrees very closely in its characters 

 with P. irritans, but is smaller, palei and the legs ai-e more slender. 

 In these particulai-s it approaches j!;«///</i/A\ but the male claspers are 

 lai'ge and half oval, and the mandibles about equal the forecoxae. 

 Named for its discoverer, who has been diligently investigating 

 the Mexican Siphonaptera for many years. 

 Hystrichopsylla americana, n sp. 



:f Length 3.25 mm. A typical Hystrichopsylla. and closely i-e- 

 ^QvahWng obtiisiceps. Color deep chestnut hrown. Head not angu- 

 lated in front above, but evenly rounded from occiput to mouth. 

 Head comb not perpendicular,asino6/j/s<ceps, but ou lower margin 

 of head, and consisting of fourteen spines on each side. Pronotal 

 comb of about fifty small, slender, close-set teeth. First abdominal 

 segment only with a comb of about forty teeth. Abdomen very 

 heavily bristled, as in obtusiceps. Seventh dorsal segment with ten 



