NEOTROPICAL MALLOPHAGA — CARRIKER 433 



Colombia, 4 females; Heights of Aripo, Trinidad, 1 female, and Sabana 

 Mendoza, Venezuela, 2 females. Another male from F. a. pana- 

 mensis, collected at Unguia, Department of Choco, Colombia, near 

 the Panamd frontier, cannot be distinguished from the series taken 

 on F. a. saturatus. 



Formicaricola costaricensis, new species 



Figures S,a,g; 9,d 



Types: Male and female adidts from Formicanus analis umbrosus 

 Ridgway, collected by the author at Guapiles, Costa Rica, March 

 1903 (author's collection). 



Diagnosis: Under the preceding species are given the differences 

 between it and the present form, which need not be repeated. The 

 other species similar to costaricensis is mexicana, from which it differs 

 in the male sex as follows: Body longer and narrower at abdomen; 

 head slightly longer, but no other difference in measurements; sides 

 of head anterior to coni strongly concave, not straight; tips of pre- 

 marginal carinae anterior to suture, wider and longer; interior carinae, 

 supporting anterior plate, longer and of different shape; eye prominent 

 (obsolete in mexicana) ; coni larger ; hyaline margin of frons transverse 

 instead of flatly rounded as in mexicana, with front of anterior plate 

 more deeply emarginate; attachment of prothorax to gular plate 

 distinct; sides of prothorax less convex and sides of pterothorax 

 slightly concave instead of convex; posterior margins of pterothorax 

 straight, not concave; anterior margin of abdominal tergite VII 

 sinuate instead of convex, and abdominal chaetotaxy shorter. The 

 genitalia are decidedlv different from all of the other known males 



(fig. M). 



The species is represented by the male holotj^pe, female allotype, 

 two female paratypes, and two females from another individual of 

 the type host collected by the author at Guacimo, Costa Rica, April 

 1903. 



Formicaricola mexicana, new species 



FiGURE.s 7, a; S,i; 9,6 



Type: Male adult from Formicarius analis moniliger Sclater, col- 

 lected by the author at Cerro Tuxtla, State of Veracruz, Mexico, 

 May 5, 1940 (USNM). 



Diagnosis: This species has been compared in detail with analoides 

 and costaricensis under the descriptions of those species and needs no 

 further remarks. The figures presented and measurements given are 

 sufficient additional description. 



The species is represented by the male holotype and two male 

 paratypes. The female is unknown. 



