426 



PSYCHE. 



[November 1S99. 



With regard to the reference here, 

 and below, to -Formica rtifa., Mr. Per- 

 gande informs me that this ant has 

 not yet been fonnd in North America. 

 Prof. Bruner writes that M. pergandei 

 is " found, most commonly with a large 

 yellowish red ant that lives in rotten 

 logs," which Mr. Pergande tells me is 

 Camponoti^s 7nellezis Say. "I have 

 however found this Myrmecophila," 

 Mr. Pergande adds, " quite frequently 

 in the nests of Camfonotiis pcnnsyl- 

 vanicus DeG., Camp. 7?iargiiiatus 

 Latr., Formica subscricea Say, Form. 

 Integra Nyl., Aphaoiogaster tennes- 

 seeensis Mayr, and Crematogaster lin- 

 eolata Say." 



The flatness of the body and its great 

 size renders this species readily distin- 

 guishable from all others except the 

 next species, from which it is separable 

 by its slenderer form and luteous edged 

 pronotum, as well as by its being more 

 sparsely tomentose, by the greater 

 length of the thoracic as compared 

 with the abdominal segments, and bv 

 its rather longer cerci. 



Myrmecophila formicarum sp. nov. 



Of large or medium size, broad ov.-\l, about 

 half as long again as broad, depressed, 

 especially beliind the pronotum, sparsely 

 tomentose, nearly uniform testaceo-castane- 

 ous, the head and liinder part of abdomen a 

 little infuscated, the antennae fully as long 

 as the body, luteo-testaceous, luteous basally, 

 the legs luteo-testaceous. Pronotum shaped 

 precisely as in M. fergandei-., mesonotura 

 and metanotum equal, slightly longer than 

 the first and second subequal abdominal seg- 

 ments. Hind femora subpyriform, distinctly 



more arcuate below than above, less than 

 twice as long as broad; outer hind tibial 

 spurs fully half as long as the hind tarsi. 

 Cerci moderately slender, slightly inflated 

 beyond the base, distinctly shorter than the 

 hind femora; ovipositor considerably longer 

 than cerci. 



Length of body, $, 2.75 mm., ?, 3.75 

 mm. ; breadth, J, i.S mm.. ?, 2.75 mm. 



I (? , 3 9. Sisson, Cala., Sept. 3, 

 A. P. Morse, with Camponotus laevi- 

 gatas Sm., as determined by Pergande ; 

 El Dorado Co., Cala., Feb. (Bruner) ; 

 Placer Co., Cala., Sept. (Bruner) ; 

 Corouado, Cala., Blaisdell (Bruner). 



This species differs from its nearest 

 ally, M. pergandei ., in its stouter form 

 and uniformly colored pronotum ; from 

 the other species by its flatter body, 

 and from all of them but M. oregoiten- 

 sis in its considerably large size ; from 

 M. oregonensis it may be distinguished 

 by its greater stoutness, lighter color 

 and longer hind tibial spurs. 



Myrmecophila oregonensis. 



Myrmecophila oregonensis Brun. ! 

 Can. ent , xvi, 43 (18S4); Fletch., 

 Rep. exp. farms Can., 18SS, 63 (1SS9) ; 

 Tayl., Ott. nat., xii, 59 (189S). 



Of medium or, in female, above the medium 

 size, oval, convex, considerably less than 

 twice as long as broad, sparsely tomentose, 

 densely and most minutely punctate, fusco- 

 castaneous, the head fuscous, tlie antennae 

 about as long as the body, luteous or luteo- 

 testaceous, the legs and cerci the same, the 

 hind femora sometimes duskier. Pronotum 

 with front and hind margins truncate, tlie 

 sides well rounded, faintly tumid and 



