Bruner: South American Crickets. 401 



pr<n-ided at apex below with a short blunt spine. Pronotum about 

 twice as long as its extreme width; the lateral edges sinuose, some- 

 what expanding above the insertion of the anterior pair of legs in a 

 similar manner to this portion of many mantids; the hind portion 

 rather suddenly ampliated and provided above just in advance of the 

 apex with a fold that is parallel to the hind margin, and which is also 

 reinforced. Tegmina long and narrow, reaching the tip of the abdo- 

 men in both sexes, irregularly^ but strongly veined on the dorsum, 

 those on the sides more regular. Wings caudate, fully one-half 

 longer than the tegmina. Legs rather long and slender, hind femora 

 just surpassing ( 9 ) or greatly prolonged beyond the tips of the elytra 

 (cf ), hind tibiae a little longer than the femora, with only a few weak 

 spines on their distal half. Dorsum of the abdominal segments four, 

 five, and six provided with rather large tubercles, or swellings, which 

 may be either single or double. Anal stilets, or cerci, quite heavy 

 and somewhat twisted or sinuate, of the same form in both sexes. 

 Ovipositor straight, the apex not enlarged, infuscated. 



Length of body, cf and 9 , 14-16 mm.; of pronotum, 2.9 mm.; of 

 tegmina, cf , lo-ll mm., 9 , 12 mm.; of hind femora, 8.5 mm.; of o\'i- 

 positor, 9 , 6.25 mm.; of cerci, 2 mm. 



Habitat. — Valparaiso (4,500 ft.). Department of Magdalena, Colom- 

 bia, S. America, five males and one female, April (H. H. Smith). 

 Types deposited in the Carnegie Museum. 



Family TRIGOXIDIID^. 



This family is made up of small, active insects, which are well 

 scattered over the warmer regions of the earth. Several of the 

 genera are represented in South America. These may be recognized 

 by referring to the accompanying synoptic key: 



Synopsis of the Genera of Trigonidiid.« with Speci.^l Reference to Tropical 



America. 



A. Last joint of the maxillary palpi, usuallJ^ but not always, broadly hatchet- 

 shaped. Antennae with the basal joint subdepiessed, rather large. La- 

 teral lobes of the pronotum subquadrate, their inferior margin nearly 

 horizontal, very gently hollowed at middle. Antennal foveolae large. 

 Front between the antennae narrowly rostrate. 

 b. Terminal joint of the palpi triangular. Tegmina in both sexes corneous, 

 without a tympanum in the males. 

 c. Anterior tibiae without a perforation, or opening; wings aborted. 

 [Oriental] Trigonidium Rambur. 



